Multiply :
4a and 6a + 7
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4a x (6a + 7)
= 4a x 6a + 4a x 7
= 24a(1+1) + 28a
= 24a2 + 28a
Hence, 4a x (6a + 7) = 24a2 + 28a
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-5cd2 by - 5cd2
-8x and 4 - 2x - x2
2a2 - 5a - 4 and -3a