find the value of 9x square -12xy +4ysquare for x=-1/2and y =-2/3
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Step-by-step explanation:
9*(-1/2)^2-12*-1/2*-2/3+4*-2/3^2
=9/4-4+16/9=(81-144+64)/36
=(145-144)/36
=1/36ans
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