Question

Urgenteeee Pleasee

1- Resolva as equações de 2° Grau.

a)2x²-40x+200=0

b)x²-11x+24=0



2) Quanto é:

a) 12% de R$ 1.300.00?

b) 25% de R$880,00

Answer 1

( A ) =(-40)-4×2×200
=1600+(-8)×200
=1600+(-1600)
=0

×1= -(-40)+0/(2×2)
×1=40+0/4
×1=40/4
×1= 10

×2= -(-40)+0/(2×
×2=40+0/4
×2=40/4
×2=10


(B) = -(-11)-4×1×24
= 121+(-4)×24
= 121+( -96 )
= 25

×1= -(-11)+25/(2×1)
×1= 11+25/2
×1=11+5/2
×1=16/2
×1= 8

×2= -(-11)-25/(2×1)
×2=11-25/2
×2=11-5/5
×2=6/2
×2=3

(2)(A)= 0,156
(B)=220