3 years ago

(-7x²-7x-7)-[(7x³-9x²-20)+(4x-11)]]=?

1 answer:

7 0

$(-7x^2-7x-7)-[(7x^3-9x^2-20)+(4x-11)]]=\\=-7x^2-7x-7-(7x^3-9x^2-20+4x-11)=\\=-7x^2-7x-7-7x^3+9x^2+20-4x+11=-7x^3+2x^2-11x+24\\\\
(5x^4+8x^2+2)+7(5x^4-3x^2)=5x^4+8x^2+2+35x^4-21x^2=\\=39x^4-13x^2+2$

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Step-by-step explanation:

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4 years ago

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makkiz [27]

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