Question

x elevado a 2 -8×+15=0

Answer 1

X1 = 5
X2= 3

X^2 = x ao quadrado ;)

Answer 2

x²-8x+15=0

A=1
B=-8
C=15

DELTA= 64-60
DELTA=4
raiz de 4 =2



8 +- 2
-------- = 8-2/2= X=3    = 8+2/2= X=5$\sqrt{x}$
   2