Question

Which of the following is a solution of x2 − 10x = –36? negative 5 minus i square root of 10 5 plus i square root of 61 negative 5 minus i square root of 11 5 plus i square root of 11

Answer 1

5 plus i square root of 11

Explanation:

I got right on the test.

Answer 2

x^2 - 10x + 36 = 0;
We use the quadratic formula: x = ( - b + or - i
`\sqrt{ -b^(2)+4ac }`)/ (2a);
We have a = 1; b = -10; c = 36;
Then, x = ( 10 + or -i
`√(44)`)/2 = 5 + or -
`√(11)`)/2 ;