Question

Rozwiąż równania.
a) (y-3)2 = 39+y2
b) -(x-6)2 = (3-x)(3+x)

Answer 1

A) (y-3)2 = 39 + y2
2y - 6 = 39 +y2/ +6
2y = 45+ 2y
4y = 45
y = 11,25

b) -(x-6)2 = (3-x) x (3+x)
2(-x) +12 = 9 - x
3(-x) = 21
-x = -7