Question

Resolva utilizando a fórmula de Baskara

Answer 1

Hiiiiii❤❤❤

A)x² - 4x + 4 - 9 = 0
x² - 4x - 5 = 0
∆= (-4)² - 4.1.(-5)
∆= 15 + 20
∆= 36

x = (-(-4)+/- \/36)/2
x = (4+/-6)/2
x' = (4+6)/2 = 10/2 = 5
x" = (4-6)/2 = -2/2 = -1

S: {-1; 5}

B)Δ = 12² - 4 . 1. 36
Δ = 144 - 144
Δ = 0

x = -12 +- 0 ÷ 2
x1 = -6 x2 = -6

C)(2x-3)^2=16
2x-3=+ - 4
2x-3=4
2x-3= -4
x=7/2

x= -1/2

resposta : x1= -1/2 ; x2= 7/2

D)X² -x +1/4-25=0x²-x-99/4=0 a=1 b=-1 c=-99/4Δ=b²-4*a*cΔ=(-1)²-4*1*(-99/4)Δ= 1+99Δ=100x=-b +- √Δ/2*ax1= -(-1) +10/2=11/2x2=-9/2