book Maths Puzzle Numerical Ability

I need help in answering this problem:
(x-5)(2x^2-7x-2)
I have to simplify the problem and write it in standard form.

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book Other Question
Hoe do you graph and solve a parabola 2. Multiply and simplify:


x^2-x-20 * x^2+7x+10

___________ ___________

x^2-3x-10 x^2+4x-5