What are the solutions of x squared - 12x + 32 = 0?
Answer and explanation
Correct answer: B. 4 and 8
- Step 1: Find two numbers with sum 12 and product 32: 4 and 8.
- Step 2: Hence (x - 4)(x - 8) = 0.
Answer
4 and 8.
Why not the others: -8 and -4, 12 and 32 and 5 and 7 do not fit.
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