Question

What is the solution set of x2 – 10 = 30x?

A. {–220, 250}
B. {–250, 220}
C. {15 – StartRoot 235 EndRoot, 15 + StartRoot 235 EndRoot}
D. {–15 – StartRoot 235 EndRoot, –15 + StartRoot 235 EndRoot}

Answer 1

15+sqrt(235), 15-sqrt(235)

Explanation:

X^2-30x-10=0

Use quadratic formula (b+-sqrt(b^2-4(a)(c)))/(2(a))

a=1, b=-30, c=-10

Answer 2

C

Explanation: