(3x2 + 4x - 2) - (5x + 7)

=3x2−x−9

Step-by-step explanation:

Let's simplify step-by-step.

=3x^2+4x−2−(5x+7)

=3x^2+4x+−2+−1(5x)+(−1)(7)

=3x^2+4x+−2+−5x+−7

Combine Like Terms:

=3x^2+4x+−2+−5x+−7

=(3x^2)+(4x+−5x)+(−2+−7)

=3x^2+−x+−9

=3x^2−x−9

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