Multiply :
-5cd2 by - 5cd2
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(-5cd2) x (- 5cd2)
= (-5) x (-5) c(1+1)d(2+2)
= 25c2d4
Hence, (-5cd2) x (-5cd2) = 25c2d4
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8ab2 by - 4a3b4
4a and 6a + 7
-8x and 4 - 2x - x2