Question

" {x}^{2} - 21 = 79" align="absmiddle" class="latex-formula">
plz help it's due it 2 min​

Answer 1

$\qquad \qquad\huge \underline{\boxed{\sf ᴀɴsweʀ}}$

Let's solve ~

$\qquad \sf \dashrightarrow \: {x}^{2} - 21 = 79$

$\qquad \sf \dashrightarrow \: {x}^{2} = 79 + 21$

$\qquad \sf \dashrightarrow \: x {}^{2} = 100$

$\qquad \sf \dashrightarrow \: x = \pm\sqrt{100}$

$\qquad \sf \dashrightarrow \: x = \pm \sqrt{10 \times 10}$

$\qquad \sf \dashrightarrow \: x = \pm10$

Answer 2

X= 10
x= -10

Use the quadratic formula to show your work.