I. 144x² - 163x - 65 = 0 144x² - 208x + 45x - 65 = 0 16x (9x – 13) + 5(9x – 13) = 0 (16x + 5) (9 x – 13) = 0 ∴ x = -5/16, 13/9 II. 91y² - 128y -48 = 0 91y² + 28y - 156y - 48 = 0 7y (13y + 4) – 12 (13 y + 4) = 0 (13 y + 4) (7y – 12) = 0 ∴ y = 12/7, -4/13 Hence, relationship cannot be established between x and y
225÷ 25 x 21 - 30 = ? + √2209 - √7744
110 ÷ 5.5 + (?)3 ÷ 12 = 20(2/3)
[(120)2 ÷24 ×25] ÷ 250 =?
22% of 560 + 34% of 2160 × 5/12 =? + 16% of 920
242 + 18 × 8 – ? = 356
48% of ? = 10176
30% of 215 + 135% of ? = 469.5
((8)0- (0.1)-1)/( (6/16)-1 ×(3/2)3+ ((-2)/6)-1) = ?/2
