If a-14, b= 12 then the value of ( a+2b)(2a-b)- (a-b)(a-b)=_
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Step-by-step explanation:
(a+2b)(2a-b)-(a-b)
=(14+2.12)(2.14-12)-(14-12)
=14+24(28-12)- 2
= 14+ 24×16-2
= 14+384-2
=396
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