Question

como calcular 2x²=-3+ 7x ?

Answer 1

2x² = - 3 + 7x
2x² - 7x = -3
2x² - 7x + 3 = 0
a= 2, b= -7, c= 3
Δ = b² - 4ac
Δ = (-7)² - 4 * 2 * 3
Δ = 49 - 24
Δ = 25

x' = -b +- √Δ / 2a
x' = 7 + √25 / 2 * 2
x' = 7 + 5 / 4
x' = 12 / 4
x' = 3

x" = 7 - 5 / 4
x" = 2 / 4 
x" = 0,5