equaçao 5X. (3X+1) = 38
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5x.(3x + 1) = 38
5x.3x + 5x . 1 = 38
15x² + 5x = 38
15x² + 5x - 38 = 0
Δ = b²−4ac
Δ = (5)²−4⋅15⋅(−38)
Δ = 25+2280
Δ = 2305
x = -b ± √Δ / 2a
x = -5 ± √2305 / 2.15
x = -5 ± √2305 / 30
x' = -5 - √2305 / 30
x'' = -5 + √2305 / 30
S = {-5 - √2305 / 30, -5 + √2305 / 30}
5x.3x + 5x . 1 = 38
15x² + 5x = 38
15x² + 5x - 38 = 0
Δ = b²−4ac
Δ = (5)²−4⋅15⋅(−38)
Δ = 25+2280
Δ = 2305
x = -b ± √Δ / 2a
x = -5 ± √2305 / 2.15
x = -5 ± √2305 / 30
x' = -5 - √2305 / 30
x'' = -5 + √2305 / 30
S = {-5 - √2305 / 30, -5 + √2305 / 30}
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