$(3x+x^2)-\{4x^2-3x+[2x^2-x-(5x^2+4x)]\}\\\\=3x+x^2-\{4x^2-3x+[2x^2-x-5x^2-4x]\}\\\\=3x+x^2-\{4x^2-3x+[-3x^2-5x]\}\\\\=3x+x^2-\{4x^2-3x-3x^2-5x\}\\\\=3x+x^2-\{x^2-8x\}\\\\=3x+x^2-x^2+8x\\\\=11x$

5 0

3 years ago

Read 2 more answers

Fine the following when a=-2, b=4, c=7<br> 7b-12 over 2ac

iren [92.7K]

Hello!

You have to put the numbers in for the variables in the equation

$\frac{7b - 12}{2ac}$

Put the numbers in

$\frac{7(4) - 12}{4(-2)(7)}$

Combine like terms

$\frac{28 - 12}{-56}$

$\frac{16}{-56}$

The is is $\frac{16}{-56}$ or about -0.29

Hope this help!

3 0

4 years ago

The following describes a linear function?

Mrrafil [7]

Answer:

The correct answer is D

Step-by-step explanation:

Hope this help

8 0

3 years ago