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4 years ago

5

Expand y=-2(4x-1)(4x+1)

2 answers:

stich3 [128]4 years ago

6 0

Y = -2(4x - 1)(4x + 1)

y = (-2*4x -2*-1)(4x + 1)

y= (-8x + 2)(4x + 1)

y = -8x*4x + -8x*1 + 2*4x + 2*1

y = -32x² + -8x + 8x + 2

y = -32x² + 2
answer

zubka84 [21]4 years ago

4 0

Y= -2(4x -1)(4x+1)
⇒ y= -2[(4x)^2 -1^2] (because (4x)^2 -1^2= (4x-1)(4x+1))
⇒ y= -2(16x^2 -1)
⇒ y= -2*16x^2 -2*(-1) (distributive property)
⇒ y= -32x^2+ 2

The final answer is y= -32x^2+ 2~

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