Question

Determine as raízes das equações:
a) x² - 7x + 10 = 0
b) (2x - 10)² = 0
c) (x + 2)² = 0
d) 5x² = 0

Answer 1

oii!

a. x²-7x+10=0
-7+-√(-7)²-4(1)(10)/2(1)
-7+-√49-40/2
-7+-3/2
x'= -5
x"= -2

b. (2x-10)²=0
√(2x-10)²=√0
2x-10=0
2x=10
x=5

c. (x+2)²=0
√(x+2)²= √0
x+2=0
x=-2

d. 5x²=0
x²=0/5
x²=0
√x²=√0
x=0

espero ter ajudado ;)