The Quadratic Formula

1. Find one value of $x$ that is a solution to the equation:

$\left(x^{2}-7\right)^{2}+2 x^{2}-14=0$

2. Let $m=2x+3$.

Which equation is equivalent to $(2 x+3)^{2}-14 x-21=-6$ in terms of $m$?

Choose 1 answer:

A. $m^{2}+7m+6=0$

B. $m^{2}−7m−15=0$

C. $m^{2}−7m+6=0$

D. $m^{2}+7m-15=0$

3. Find one value of $x$ that is a solution to the equation:

$\left(x^{2}+4\right)^{2}-11\left(x^{2}+4\right)+24=0$

4. Find one value of $x$ that is a solution to the equation:

$(2 x+3)^{2}-6 x-9=0$