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 $y=ax^2+bx+c$

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