(i) (7x + 3) (7x – 4) = 49 x2 – 7x – 12
explain this to me
which formula is related to this?​

1 thought on “(i) (7x + 3) (7x – 4) = 49 x2 – 7x – 12<br />explain this to me<br />which formula is related to this?​”

1. Answer:

   (a+b) (c-d) = (axc+bxc)-(axd+bxd)

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