Subtract (2x3 + 9x − 8) − (4x2 − 15x + 7).
2 answers:
2x^3 + 9x - 8 - (4x^2 - 15x + 7)....distribute thru the parenthesis
2x^3 + 9x - 8 - 4x^2 + 15x - 7....combine like terms
2x^3 - 4x^2 + 24x - 15 <==
Distribute invisible -1
-1(4x^2-15x+7)=-4x^2+15x-7
now we have
2x^3+9x-4x^2+15x-7
group like terms
2x^3-4x^2+9x+15x-8-7
add
2x^3-4x^2+24x-15
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