Question

x = -7 + √-7² - 4 x 1 x 10 ÷ 2 x 1

Answer 1

X=-7+√-49-20x
-√-49-20x=-7-x
-√-49-20x=7+x
-49-20x-(7+x)²
-49-20x=49+14x+x²
-49-20x-49-14x+x²
Resumindo.
98-34x-x²=0
-x²-34x-98=0
X²+34+98=0
Resumindo.
X=-34+2√191/2
X=-34-2√191/2
X=-17+√191
X=-17-√191
Solução final= -17+√191