Question

multiply (1.5a-2.5b) by (1.5a+2.5b)

Answer 1

(1.5a-2 .5b)(1.5a+2.5b)
it is in the form of (a-b)(a+b)=a²-b²

(1.5a)²-(2.5b)²
2.25a²-6.25b²

Answer 2

it is in the form of (a+b) (a-b)
therefore a^2-b^2
this is equal to (1.5a)^2-(2.5b)^2
2.25a^2-6.25b^2
two point twenty five a square minis six point twenty five b square


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