Answer:
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The square roots of 64 is A B and C.
32x^2+64x+12x+21
=> 32x^2+76x+21 you multiply the two equation together and you will get this
Everyday, make her/him learn 3-4 tables. After 3 days, give him/her a 'prize' for it. If that does not work, try teaching him 1 by 1 and memorize it.