What is the factored form of the expression? 16b^2 – 81

(4b-9) (4b+9)

Step-by-step explanation:

16b^2 – 81

This is the difference of squares

(a^2 -c^2) = (a-c) (a+c)

a^2 = 16b^2   so a= 4b

c^2 = 81   so c = 9

(16b^2 – 81) = (4b-9) (4b+9)

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step-by-step explanation:

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it will cost dollar $540

the living room is 3 which means if we divide 325/3 then we get $108

therefore if 1part of the living room cost $108 and 3 costed $325

then total 5part of the room will cost 5*108 which gives $540