(1.5+3)(1.5−3) in algebraic form
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(1.5+3)(1.5-3)
=> (a+b)(a-b) = (a^2 - b^2)
so
= (1.5)^2 - 3^2
= 2.25 - 9
= - 6.75
=> (a+b)(a-b) = (a^2 - b^2)
so
= (1.5)^2 - 3^2
= 2.25 - 9
= - 6.75
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