Question

How do you factor completely 4x^2 - 28x +40?

Answer 1

Answer:

4x^2 - 20x - 8x + 40

(product 4x 40 = 160 )

split it two factors such that sum is. - 20 - 8 = -28 (middle term)

and their product is 160

4x( x - 5) - 8 (x - 5)

(x - 5) ( 4x - 8)

The factors are ( x - 5) (4x - 8)

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