Question

Решите уравнения: 1)х * х=81 2)у * у=169 3)(х-3) * ( х-3) = 25 4)(у+2) * ( у + 2) = 49

Answer 1

X*x=81
x²=81

x=9
x=-9

x1=-9; x2=9

2.
y*y=169
y²=169

y=13
y=-13

y1=-13; y2=13

3.
(x-3)(x-3)=25
(x-3)²=25

x=8
x=-2

x1=-2; x2=8

4.
(y+2)(y+2)=49
(y+2)²=49

y=5
y=-9

y1=-9; y2=5

Answer 2

1) 9×9=81

2)13×13=169

3)(8-3)×(8-3)=25

4)(5+2)×(5+2)=49