Start learning 50% faster. Sign in now
For I: (a - 6)2 = (9a - P - a2) Or, a2 + 36 - 12a = 9a - P - a2 Or, 2a2- 21a + (36 + P) = 0 Since, 2.5 is a root of the given equation, 2 × (2.5)2- (21 × 2.5) + (36 + P) = 0 2 × 6.25 - 52.5 + 36 + P = 0 Or, 12.5 - 52.5 + 36 + P = 0 Or, - 40 + 36 + P = 0 So, 'P' = 4 So, the given equation becomes, 2a2- 21a + 36 + 4 = 0 Or, 2a2- 21a + 40 = 0 So, product of the roots = (40/2) = 20 So, other root of equation I = 20 ÷ 2.5 = 8 So, smaller root of equation II = 8 ÷ 2 = 4 Now, for II: (P - b)2 + (b + Q)2 = 3(9b - B) + 10 Or, (4 - b)2 + (b + Q)2 = 27b - 3Q + 10 Or, 16 + b2- 8b + b2 + Q2 + 2Qb = 27b - 3Q + 10 Or, 2b2- 8b + 2Qb - 27b + 6 + 3Q + Q2 = 0 Or, 2b2- b(8 - 2Q + 27) + 6 + 3Q + Q2 = 0 Since, 4 is a root of the given equation, 2 × (4)2 - 4 × (35 - 2Q) + 6 + 3Q + Q2 = 0 Or, (2 × 16) - 140 + 8Q + 6 + 3Q + Q2 = 0 Or, 32 - 140 + 11Q + 6 + Q2 = 0 Or, Q2 + 11Q - 102 = 0 Or, Q2 + 17Q - 6Q - 102 = 0 Or, Q(Q + 17) - 6(Q + 17) = 0 Or, (Q + 17) (Q - 6) = 0 So, 'Q' = 6, or 'Q' = -17 Required product = 2.5 × 4 = 10
What does the "Word Count" feature in a word processing software typically provide?
A person, 'Q', uses 40% of their monthly income on food and then spends 60% of what is left on rent. After covering these expense...
I). p 2 – 5p – 126 = 0
II). q 2 + 9q – 90 = 0
Income of A is twice the income of B. B and A spend 55% and 65% respectively of their incomes. Find the savings of A, if B saves Rs. 18000 in a month.
28, 52, 84, 124, 172, ?.
315 people went to a park. The number of men is 25 more than the number of women and the number of adults is 15 more than the number of children. How ma...
Pipe P can fill a tank by itself in 16 hours, while pipe R can empty the tank in 36 hours when it is full. Together, pipes P and ...
Ayush invested a certain amount at a compound interest rate of 20% per annum, compounded annually, for 2 years and earned Rs. 2,3...
Three colleagues, M, N, and O, have an average age of 27. Ten years ago, their ages were in the ratio of 4:6:7. What is the average age of M and N today?
A triangle has sides 7 cm, 24 cm, and 25 cm. A circle is inscribed in the triangle. What is the area of the triangle not covered by the circle?