Решите уравнение 49y2 – 64 = 0

Question

Решите уравнение 49y2 – 64 = 0

Comments

49у^2 - 64 = 0

Answer 1

(7y+8)(7y-8)=0
7y+8=0
y=-8÷7
y₁≈-1,429
7y-8=0
y=8÷7
y₂≈-1,429

Comments

49y^2-56y+56y-64=0

Answer 2

(7y-8)(7y+8)
y=8/7 или y=-8/7

Comments

извините, не совсем поняла..