How do you write $(x^2 + 4x – 3)(2x^2 + x + 6)$ in standard form?

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Answer 1 · 2017-12-12T19:15:23

$2x^4+9x^3+4x^2+21x-18$

This is a long one, but it's not difficult, as long as we watch our signs

$(x^2+4x-3)(2x^2+x+6)$

$2x^4+x^3+6x^2+8x^3+4x^2+24x-6x^2-3x-18$

combine like terms:

$2x^4+(1x^3+8x^3)+(6x^2+4x^2-6x^2)+(24x-3x)-18$

$2x^4+9x^3+4x^2+21x-18$

How do you write (x^2 + 4x – 3)(2x^2 + x + 6)(x^2 + 4x – 3)(2x^2 + x + 6) in standard form?