Question

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

Answer 1

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