Square of X + 10x + 21 = 0

Square of X + 10x + 21 = 0


x²+10x+21=0
(x+3)(x+7)=0
x+3=0 x+7=0
Ψ x = - 3 or x = - 7



The process of finding the square of X + 10x + 16 = 0
I just forgot to say that. The formula method is used. =


x^2+10x+16=(x+2)(x+8)=0
x=-2,x=-8
In terms of matching method:
x^2+10x+16=(x+5)^2-25+16=0
(x+5)^2=9
x+5=3,x+5=-3
x=-2,x=-8

Elden Ring Premiere

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