Question
I. 20x² - 93x + 108 = 0 II.72y² - 47y -
144 = 0Solution
I. 20x² - 93x + 108 = 0 20x² - 48x - 45x + 108 = 0 4x (5x – 12) – 9(5x – 12) = 0 (4x – 9) (5x – 12) = 0 x = 9/4 , 12/5 II. 72y² - 47y - 144 = 0 72y² + 81y - 128y - 144= 0 9y(8y + 9) – 16(8y + 9) (9y – 16) (8y + 9) = 0 y = 16/9 , -9/8 Hence x > y.
{(23.65 × 35.12) ÷ 6.97} + 179.86 = ? × 14.76
What approximate value should come in the place of question mark in the following questions?
25.02% of 460.02 + ?% of 300.02 = 295.21
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
(2520.33 ÷ 41.67) × (√168.88 + √80.78) - 10% of 1499.85 = ?
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
26.23 × 31.82 + 44.8% of 1200 + ? = 1520
66.05 × 17.95 – 38.99 × 18.12 = (60 + ?) × 6
If cosec (2A + B) = (2/√3) and cosec (A + B) = √2, find the value of (4A - B) .
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