Question

Calculati ecuatiile :
a). x²=36
b). 2x²=50
b). -6x²=-24

Answer 1

a ) x² = 36 → x = 6 sau x = -6
x apartine { -6; 6}

b) 2x² = 50 → x² = 25 → x = 5 sau x = -5
x apartine { -5; 5}

c) -6x² = -24 → x² = 4 → x = 2 sau x = -2
x apartine { -2; 2 }

Answer 2

a)x²=36
x=√36=6 ;-6

b)2x²=50 |:2
x²=25
x=√25=5 ; -5

c)-6x²=-24 |:6
-x²=-4 |•(-1)
x²=4
x=√4=2 ;-2
Succes!