Question

Use the quadratic formula to solve x2 + 7x + 8 = 0. Estimate irrational solutions to the nearest tenth.

Answer 1

Explanation:

Answer 2

`x^2 + 7x + 8 = 0\\ \\a=1, \ b=7 ,\ c=8 \\ \\ x_(1)=(-b-√(b^2-4ac))/(2a)=(-7-√(7^2-4 \cdot 1\cdot 8))/(2 \cdot 1)=(-7-√(49-32))/(2)=(-7-√(17))/(2)\\ \\x_(2)=(-b+√(b^2-4ac))/(2a)=(-7+√(7^2-4 \cdot 1\cdot 8))/(2 \cdot 1)=(-7+√(49-32))/(2)=(-7+√(17))/(2)`