Question

x2-91=53
x2+18=187
x2-56=169

Answer 1

x²-91=53
X²= 53 + 91
X² = 144
X= ±√(144)
X = ±12

X= 12, x = - 12



x²+18=187
X²= 187 - 18
X² = 169
X = ±√(169)
X = ± 13

X = 13, x= - 13

x² -56=169
X² = 169 + 56
X² = 225
X = ±√(225)
X = ±15

X = 15, x= - 15