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Question
Use the formula to multiply the following.
`("x"/5+6)("x"/5-6)`
Sum
Solution
It is known that, (a + b) (a − b) = a2 − b2.
`("x"/5+6)("x"/5-6)`
= `("x"/5)^2-(6)^2`
= `"x"^2/25-36`
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