Question
The roots of the equation 9 (x+9)² = 441
are:Solution
9 (x+9)² = 441 9(x2+81+18x) =441 x2+81+18x =49 x2+18x+32=0 x2+16x+2x+32 =0 x(x+16) +2(x+16) =0 (x+16) (x+2) =0 When x+16=0 then, x=-16 when x+2 =0 x= -2. (-2, -16)
More Previous Year Paper Questions
- Find the simplified value of following expression:
0.998 + 0.882 + 0.12 ?2 × 25 = 42 × 21 + 172Â
- What will come in the place of question mark (?) in the given expression?
389 + 641 - ? = 180 X 2 9 × 4 ? ÷ 16 = 144
(√1024 + √324)% of 780 = ?% of 260
What value should come in the place of (?) in the following questions.
336 ÷ 6 ÷ √16 * ? = 1400 ÷ 4
What will come in the place of question mark (?) in the given expression?
9 (? + 12) = 3 (14 + 17 - 11)
Evaluate: (768÷16)×(125÷25)−(81÷9)×12
81 ÷ 0.09 × 1.4 – 1223=?
32 × 3 (54 – 15) + 186 ÷ 3 ÷ 2 – (21)² = ?
