Question

01) Resola as equações do 2° grau incompletas:
a) x2 - 49 = 0
B) x 2 = 1
C) 2x 2 -50=0
D) 7x² -7=0
E) 4 x 2 = 36​

Answer 1

Resposta:

a)x=7

b) x=1

c) x=5

d) x=1

e) x=3

Explicação passo-a-passo:

$x^{2}=49\\x=\sqrt{49} \\x=7\\\\x^{2} =1\\x=\sqrt{1} \\x=1\\\\2x^{2} =50\\\x^{2} =50/2\\x^{2} =25\\x=\sqrt{25} \\x=5\\\\7x^{2} =7\\x^{2} =7/7\\x=\sqrt{1} \\x=1\\\\4x^{2} =36\\x^{2} =36/4\\x^{2} =9\\x=\sqrt{9} \\x=3$