Question

resolva as equações do 2⁰ grau
a) x²-8×+15=0
b) x²-6x+5=0
c) ײ-7×+10=0
ajuda!!!​

Answer 1

a)x²-8x+15=0

delta=(-8)²-4.1.15

delta=64-60

delta=4

x'=8+2/2

x'=10/2

x'=5

x"=8-2/2

x"=6/2

x"=3

b)x²-6x+5=0

delta= (-6)²-4.1.5

delta=36-20

delta=16

x'=6+4/2

x'=10/2

x'=5

x"=6-4/2

x"=2/2

x"=1

c)x²-7x+10=0

delta=(-7)²-4.1.10

delta=49-40

delta=9

x'=7+3/2

x'=10/2

x'=5

x"=7-3/2

x"=4/2

x"=2

Espero ajudar❤