Question

Как решить (3x+5x)*x/2=100

Answer 1

$(3x+5x)* frac{x}{2} =100$
$frac{8x*x}{2} =100$
8x²=200
x²=25
x₁=-5; x₂=5

Answer 2

8x*x/2=100
4x^2=100
x^2=100/4
x^2=25
x=5