Question

x²-2x+3=12+6x me ajudem com Bháskara

Answer 1

x² - 2x + 3 - 12 - 6x = 0
x² - 8x - 9 = 0

Δ = b² - 4ac
Δ = 64 - 4 * 1 * -9
Δ = 64 + 36
Δ = 100
√Δ = 10

x = -b +/- √Δ / 2a
x = 8 +/- 10 / 2

x' = 8 + 10 / 2
x' = 18 / 2
x' = 9

x'' = 8 - 10 /2
x'' = -2/2
x'' = -1

Um abraço!

Answer 2

Δ=4²-4.1.-9
Δ=52
x=(-4)+√16÷2                x=(-4)-√16÷2
x=-4+4÷2                      x=-4-4÷2
x=2                                x=-4