The radicals must have the same indexes.
Examples when radicals have index of 2.
√3√7 = √(3*7) = √21
√2√6 = √(2*6) = √12 = √(4*3) = √4√3 = 2√3
We decided that i2 = -1, and i = √-1, to be able to find the square root of any negative radicand, which is not a real number.
For example,
√-4 = √(-1*4) = √-1√4 = 2i.
√-45 = √-1√45 = i√(9*5) = i√9√5 = 3√5 i
Also, we allow ourselves to multiply the radicals of index 2, even though one or both of the radicals are negative.
√-5√6 = = √(-5*6) = √-30 = i√30. But I do prefer to work in this way:
√-5√6 = = √-1√5√6 = = i√(5*6) = i√30. This work will eliminate the common mistake that students always do when they multiply radicals of index 2 with both negative radicands.
For example,
√-2√-3 = √(-2*-3) = √6 (wrong, a positive real number!)
√-2√-3 = (√-1√2)(√-1√3) = (i)(i)√(2*3) = i2√6 = -√6.
Examples of division:
√10/√2 = √(10/2) = √5
√-15/√3 = (√-1√15)/√3 = i√(15/3) = i√5
√21/√-7 = √21/(√-1√7) = (1/i)√(21/7) = (1/i)√3 but this result is not a representative of an imaginary number, as we decided it to be. So what to do in order to manipulate the result and write it as a proper imaginary number?
Let 1 = -(-1) = -(i2), then I will have (1/i)√3 = (-i2/i)√3 = -i√3, the right answer.
Conclusion: 1/i = -i.
√-35/√-5 = (√-1√35)/(√-1√5) = (i/i)(√35/5) = √7, the right work.
Even though, √-35/√-5 = (√(-35/-5) = √(35/5) = √7, it is wrong to work in that way.
So we solved the problem of finding the square roots of negative numbers, by using the imaginary number i, and we also called it a complex number, and so we built a new set of numbers, the set of complex numbers. Actually, all numbers are invention of our mind, even though I would prefer not to say it for the number 1.
S= 3R multiplied by the square root of 3 (the result must be divided by 2.)
find the smallest number by which 9408 must be multiplied to get a perfect square/ also find the square of the number
No because the numerator and the denominator must be multiplied or divided by the same number for a given equivalent fraction
12
you cant. the quadratic function must be expressed as a number. Radicals and numbers dont mix
S= 3R multiplied by the square root of 3 (the result must be divided by 2.)
Copy it's DNA
For addition and subtraction, nothing. For multiplication, nothing provided you are able to use the distributive property efficiently. For division the mixed fraction should be converted to a top-heavy fraction. Although this can help with the other operations, it is not a "must".
You must be kidding me, but if you insist. 7x7=49And... 49 divided by 7=7Correct answer: 49 x 7 = 343
find the smallest number by which 9408 must be multiplied to get a perfect square/ also find the square of the number
dna
The smallest number is 504. There are no common factors other than 3x3, 2x2x2, and 7, so they must be multiplied together.
9 must be multiplied by 211/3 in order to get 192.
No because the numerator and the denominator must be multiplied or divided by the same number for a given equivalent fraction
2.28
An octagonal pyramid has nine faces. It also has nine vertices and 16 edges. You can find the volume of this pyramid by using the formula that the base 'B' multiplied by the height 'h' must be divided by three.
In order to solve 7/9 divided by 8/15, you must multiply by the reciprocal. In other words, 7/9 divided by 8/15 becomes 7/9 multiplied by 15/8. After this, you can cross cancel if there are common factors. 9 and 15 have a common factor of 3, so you can divide each by 3. The problem then becomes 7/3 multiplied by 5/8. You then multiply across the top and the bottom. Your final answer then is 35/24.