Find the smaller value of x that satisfies the equation x\(^2\) + 7x + 10…

Mathematics WAEC 2011

Find the smaller value of x that satisfies the equation x\(^2\) + 7x + 10 = 0

  • -5 checkmark
  • -2
  • 2
  • 5

The correct answer is: A

Explanation

x\(^2\) + 7x + 10 = 0

x2 + 5x + 2x + 10 = 0

x(x + 5) + 2(x + 5) = 0

(x + 2)(x + 5) = 0

x + 2 = 0 or x + 5 = 0

x = -2 or x = -5

the smaller value x = -5

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