Solve 5x2 - 125 = 0 by factorising.
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Answer:
x=±5
Step-by-step explanation:
5x²-125=0
(√5x)²-(√125)²=0
(√5x-√125)(√5x+√125)
x=√125/√5. = 5√5/√5=5
x= - √125/√5 = - 5√5/√5 = -5
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