use appropriate identity and find the product of (b-7)2
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Answer:
b^2 -14b +49
Step-by-step explanation:
( x-y) ^2 = x^2 +y^2 -2xy
put x = b and y = 7
= b^2 + 7^2 - 2×b×7
= b^2 + 49 -14b
= b^2 -14b +49
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