10a - 5b = 25 So 5b = 10a - 25 and hence b = 2a - 5
The greatest common factor (GCF) of 15ab and 5b2 is 5b.
100a2 - 49b2 is the difference of two perfect squares. Therefore, it is equal to the sum times the difference of the roots: (10a + 7b)(10a - 7b)
The GCF is 5b.
15a - 25b + 20 = 5 (3a - 5b + 4)
10a - 5b = 25 So 5b = 10a - 25 and hence b = 2a - 5
The expression is simplified to: 12f-(10a+5b)
Factor completely and check mentally 10a^2+20a
10a+7b undefined variables cannot be determined
10a + 5b
(5b - 4)(5b + 4)
The greatest common factor (GCF) of 15ab and 5b2 is 5b.
The GCF of 15ab and 5b squared is 5b.
There is a formula for the "difference of squares." In this case, the answer is (5b - 14c)(5b + 14c)
You can't just solve one side of the equation. You always have to have both sides of the equal sign in order to manipulate the terms. If you have an equation like 10a + 5b=0, you can now solve for one of the terms (a or b), for example, b=10a/5 and a=-5b/10. Once you have solved for one term, you can plug it back into the equation and solve for real values. In this particular equation, a=-1/2b so by putting any value in for b (say 2), you get a definite value for a (-1) but there are an infinite number of such values.
5b
5b