Question

решите уравнение 49y2 – 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

Answer 2

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