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If A = 3x^2 + 5x-6 and B = -2x^2 - 6x + 7, thenA-B equals:1) -5x2 - 11x + 132) 5r2 + 11x - 133) -5r2 - 3+14) 5x2-x+1

User MOLAP
by
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1 Answer

6 votes

Step-by-step explanation:

To calculate A - B, we need to replace A by 3x^2+5x-6 and B by -2x^2-6x+7.

So, we get:


\begin{gathered} A-B \\ (3x^2+5x-6)-(-2x^2-6x+7) \end{gathered}

If we eliminate the brackets, we get:


3x^2+5x-6+2x^2+6x-7

Applying commutative property and adding similar terms:


\begin{gathered} 3x^2+5x-6+2x^2+6x-7 \\ 3x^2+2x^2+5x+6x-6-7 \\ 5x^2+11x-13 \end{gathered}

Answer: 2) 5(x^2) + 11x - 13

User Robabby
by
7.4k points
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