Solve the problem.
-A number is 20 less than its square. Find all such numbers.
A) -4 and 4
B) -5 and 5
C) -5 and 4
D) -4 and 5

Name: Solve the problem. -A number is 20 less than its square. Find all such numbers. A) -4 and 4 B) -5 and 5 C) -5 and 4 D) -4 and 5
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Question

Quizplus · Accepted Answer

To find the numbers, set up the equation x = x^2 - 20. Rearranging gives x^2 - x - 20 = 0. Factoring gives (x - 5)(x + 4) = 0, so the solutions are x = 5 and x = -4.

Solve the Problem. -A Number Is 20 Less Than Its Square. Find All