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Brandi
Mathematics
4 December, 10:39
Factor completely. 640-10x^2
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Cierra Carrillo
4 December, 10:49
0
10 (8-x) (8+x)
Step-by-step explanation:
640-10x^2
Factor out 10
10 (64 - x^2)
Notice that inside the parentheses is the difference of squares
10 (8^2 - x^2) and a^2 - b^2 = (a-b) (a+b)
10 (8-x) (8+x)
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Immanuel Cannon
4 December, 11:03
0
10 (8 - x) (8 + x)
Step-by-step explanation:
Given
640 - 10x^2
Solution
Take out 10 on each side of the minus sign
10 (64 - x^2)
The expression in the brackets is a difference of squares which factors as
a^2 - b^2 = (a + b) (a - b)
Factor the expression inside the brackets as a difference of squares.
64 = 8*8
x^2 = x*x
10 (8 - x) (8 + x)
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