Question

Solve each equation by factoring. 5a^2-2a-47=0

A. I/2,-6
B. 7/5 , -1
C. 1/5 ,-7
D.-4/7,-1

Answer 1

a = -2.872 and 3.272

Explanation:

Given the equation 5a^2-2a-47=0

Using the general formula;

a = 2±√2²-4(5)(-47)/2(5)

a = 2±√4+940/10

a = 2±√944/10

a = 2±30.72/10

a = 2-30.72/10 and 2+30.72/10

a = -28.72/10 and 32.72/10

a = -2.872 and 3.272