Question

a-x²+4x+4
b-x²-6x+9
c-4x²+12x+9
d-25x²+100x+100
e-x²-x+1
por favor me ajudem

Answer 1

a) x^2+4x+4 a=1 b=4 c=4
delta= 4^2-4×1×4
delta=16-16=0
x'= (-4+0)÷2= -2
x"= (-4-0)÷2= -2

b) x^2-6x+9 a=1 b= -6 c=9
delta = (-6)^2-4×1×9
delta = 36-36=0
x'=(6+0)÷2=3
x"=(6-0)÷2=3

c) 4x^2+12x+9 a=4 b=12 c=9
delta = 12^2-4×4×9
delta = 144-144=0
x'=(-12+0)÷8= -1,5
x"=(-12-0)÷8= -1,5

d) 25x^2+100x+100 a=25 b=100 c=100
delta = 100^2-4×25×100
delta =10000-10000=0
x'=(-100+0)÷50= -2
x"=(-100-0)÷50= -2