70
5/7 + 7/9 = 45/63 + 49/63 = 94/63 or 1 31/63
63
56v2 + 121v + 63 = 56v2 + 49v + 72v + 63 = 7v*(8v + 7) + 9*(8v + 7) = (8v + 7)*(7v + 9)
6/7 x 9/9 = 54/63 80/9 x 7/7 = 560/63 54/63 + 560/63 = 614/63
30a2+89a+63 = (5a+9)(6a+7) when factored
144
144
5/9 + 5/7 = 35/63 + 45/63 = 80/63 or 1 20/63
36/63 + 56/63 = 92/63 or 1 and 29/63
144
(8b + 7)(7b + 9)
2 squared plus 2 x 3 = 10, 7 squared plus 7 x 2 = 63, 6 squared plus 6 x 5 = 66,8 squared plus 8 x 4 = 96 so 9 squared plus 9 x 7 = 81 + 63 = 144.