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28 votes
28 votes
Can you help me with my work

User Warren Stringer
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1 Answer

19 votes
19 votes

Solution

For this case we can do this:


(2x+1)(x+2)=2x^2+4x+x+2=2x^2+5x+2
(x-7)(x^2+2x+3)=x^3+2x^2+3x-7x^2-14x-21=x^3-5x^2-11x-21


(3x-1)(x+5)=3x^2+15x-x-5=3x^2+14x-4
(x-8)(x+8)=x^2-8x+8x-64=x^2-64
(3x+2)(3x-2)=9x^2-6x+6x-4=9x^2-4
(x-4)(2x^2+3x-1)=2x^3+3x^2-x-8x^2-12x+4=2x^3-5x^2-13x-4^{}

User Senthalan
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3.1k points