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If a=2,b=-1,c=-3 and d=-2.find the value of 7a2-3ac+d2

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If a=2,b=-1,c=-3 and d=-2.find the value of 7a2-3ac+d2...

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If a=2,b=-1,c=-3 and d=-2.find the value of 7a2-3ac+d2​

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If a=2,b=-1,c=-3 and d=-2.find the value of 7a2-3ac+d2