Problem
6. (MGSE9-12.A.REI.4) Solve \( x^{2}-x-30=0 \) A. \( x=3 \) and \( x=-10 \) B. \( x=-5 \) and \( x=6 \) C. \( x=2 \) and \( x=-15 \) D. \( x=5 \) and \( x=-6 \)
Solution
Step 1 ：Factor the quadratic: \( (x-6)(x+5)=0 \)
Step 2 ：Set each factor equal to zero: \( x-6=0 \) and \( x+5=0 \)
Step 3 ：Solve each equation: \( x=6 \) and \( x=-5 \)
