What is the standard form of #y=(2x+7)(-3x-3) -4x^2-8x#?

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Answer 1 · 2018-07-26T07:57:59

#y=-10x^2-35x-21#

Given -

#y=(2x+7)(-3x-3)-4x^2-8x#

#y=-6x^2-21x-6x-21-4x^2-8x#

#y=-10x^2-35x-21#

Answer 2 · 2018-07-26T07:58:54

Expand the brackets

#y=(2x+7)(-3x-3)-4x^2-8x#

#=> y=-6x^2-6x-21x-21-4x^2-8x#

Collect like terms

#=> y=-10x^2-35x-21#

Now it is in the form #y=ax^2+bx+c#