You can put this solution on YOUR website! i am so confused:
5) (3x-4)(x+5)
6) (x+2)(x²+x+5)
7) (x+1)(x³+4x²+7x+3)
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You didn't say what you want to do. I'll guess it's multiply, so
5) (3x-4)(x+5)
= 3x*(x+5) - 4*(x+5) Multiply each element by the other binomial
= 3x^2+15x - 4x-20
Collect like terms, that is, all x^2 terms, x terms, etc
=
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7) (x+1)(x³+4x²+7x+3)
= x*(x³+4x²+7x+3) + 1*(x³+4x²+7x+3)
=
Collect like terms (terms with the same exponent)
=
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You do #6. If you have questions, email me (the thank you note sends me email)
