SOLUTION: factor out completely {{{ 16x^2 - 25 }}}
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Question 418622
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factor out completely
Answer by
algebrahouse.com(1659)
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16x^2 - 25
It is a difference of two squares, in the form a^2 - b^2
- it factors into the form (a + b)(a - b)
If a^2 = 16x^2.....a = 4x {took square root}
If b^2 = 25........b = 5 {took square root}
16x^2 - 25
= (4x + 5)(4x - 5)
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