Question

resolva a equação 5x2+25x-30=0

Answer 1

5x^2+25x-30=0
x^2+5x-6=0
/\=5^2-4.1.(-6)
/\=25+24
/\=49
x=-5+-\/`49/2.1
x=-5+-7/2
x'=-5+7/2
x'=2/2
x'=1
x"=-5-7/2
x"=-12/2
x"=-6

x'= 1
x"= -6

Answer 2

Explicação passo-a-passo:

5x² + 25x - 30 = 0

x² + 5x - 6 = 0

x² + 5x = 6

x² + 5x + 25/4 = 6 + 25/4

(x + 5/2)² = 49/4

x + 5/2 = 7/2

x = 7/2 - 5/2 = 2/2 = 1

x + 5/2 = -7/2

x = -7/2 - 5/2 = -12/2 = -6

S = (-6, 1)