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81x2 + 72x + 16 = 81x2 + 36x + 36x + 16 = 9x(9x + 4) + 4(9x + 4) = (9x + 4)2
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Find the factorization 81x2 plus 72x plus sixteen?
Since the first and the last term happen to be perfect squares, you can take the square root of each, and check whether the linear term (the central term) happens to be twice the first term, times the last term. In this case it is.
Find the intercepts of the plane 72x - 50y plus 188 equals 0?
http://wolfa.com/input/?i=72x-50y%2B188%3D0 72x-50y+188=0 Rewrite as 72x-50y=-188 x = -188/72 = -2.611 y = -188/-50 = 3.76 For more information and fraction form of the answer, see the link above
Find the intercepts of the plane 72x - 50y plus 52z plus 188 equals 0?
72x - 50y + 52z = -188-- At the x-intercept, 'y' and 'z' are zero.72x = -188x = -2.611...-- At the y-intercept, 'x' and 'z' are zero.-50y = -188y = 3.76-- At the z-intercept, 'x' and 'y' are zero.52z = -188z = -3.615 (rounded)
How do you factor 8xsquared plus 72x?
8x(x+9)
What is 4x4-8x3 plus 31x2-72x-45 equals 0?
It is a quartic equation in the variable x.
Solution of the equation 2x plus 3 equals 7?
2x + 3 = 72x = 4x = 2
What is 5x plus 67x plus 7?
35x^2 + 77x + 42 Improved answer: 5x+67x+7 When simplified = 72x+7
What is -72x to the third power -8x squared?
-64
You think of a number When you divide 72 by one more than your number you get the same answer as when you divide 54 by one less than my number. What is my number?
7 (x+1)/72 = (x-1)/54 x+1 = (72x-72)54 54x+54 = 72x-72 54x-72x = -72-54 -18x = -126 x = 7
81x2 - 72x plus 16 is a perfect square trinomial true or false?
If a trinomial is a perfect square, then the discriminant will equal 0. The discriminant is equal to B^2-4AC. The variables come from the standard form of a quadratic which is Ax^2+Bx+C In this problem, A=81, B=-72, and C=16 so the discriminant is: (-72)^2-4(81)(16)=5,184-5,184=0 so this is a perfect square trinomial. To factor, notice that 81=9^2 and 16=4^2, so 81x^2=(9x)^2. We can then factor the trinomial into (9x+4)(9x-4)
What is the number when two times a number is decreased by 3 and results are11?
72x-3=112x=14x=7
2x plus 4y equals 7 what are the values of x and y?
2x + 4y = 72x - 2x + 4y = 7 - 2x4y = -2x + 74y/4 = -2x/4 + 7/4y = -(1/2)x + 7/4Now that y is a function of x, you can give some values for x and find the corresponding values for y. (There are infinitely values for x an y)
