Solve by factoring 4x^2-25=0

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asked Sep 21, 2016 170k views

1 Answer

Alan Dunning · Answer 1 · 2016-09-26T23:36:06+0000

4x² - 25 = 0
4x² - 10x + 10x - 25 = 0
2x(2x) - 2x(5) + 5(2x) - 5(5) = 0
2x(2x - 5) + 5(2x - 5) = 0
(2x + 5)(2x - 5) = 0
2x + 5 = 0 U 2x - 5 = 0
- 5 - 5 + 5 + 5
2x = -5 2x = 5
2 2 2 2
x = -2¹/₂ x = 2¹/₂

Solution Set: {-2¹/₂, 2¹/₂}

Solve by factoring 4x^2-25=0

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