Solve 4x² - 16x + 15 = 0.

Correct Answer is : x = 1 12\;1/221 or x = 2 12\;1/221

Correct Answer is : x = 1 12\;1/221 or x = 2 12\;1/221

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WAEC Mathematics 2019 Paper

Question : 13

Total: 50

Solve

4x^{2}

- 16x + 15 = 0.

Solution:

4x $^2$ - 16x + 15 = 0

$4x^2$ - 6x - 10x + 15 = 0

2x(2x - 3) - 5(2x - 3) = 0

(2x - 3)(2x - 5) = 0

x = 1 $\;\frac{1}{2}$ or x = 2 $\;\frac{1}{2}$

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