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The value of 9x^(2) + 49y^(2) - 42 xy, ...

The value of `9x^(2) + 49y^(2) - 42 xy`, when x = 15 and y = 3 is

A

636

B

576

C

456

D

386

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MTG IIT JEE FOUNDATION-PREP TEST 1 -SECTION-B
  1. The value of 9x^(2) + 49y^(2) - 42 xy, when x = 15 and y = 3 is

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  2. In Fig। 9.38. ABCD is a square with AB= 15 cm. Find the area of the sq...

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  3. Find whether the following measures can be the sides of triangles. (...

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  4. A multistorey building has 25 floors above the ground level each of he...

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  5. Construct two equations with the solution x = 20.

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  6. Arrange the following rational numbers in ascending order. 3/7, 4/5,...

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  7. For the celebrating children’s students of Class VII bought sweets for...

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  8. Rahul does the push-ups 25, 25, 50, 80, 75, 50, 75, 80, 25, 50 in 10 d...

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  9. AD is the bisector of angleA such that AD bot BC. Then, find out whet...

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  10. A car cost Rs 500000 one year ago, now costs Rs 200000. Find the perce...

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  11. Find the area of the shaded portion.

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  12. From the sum of x^2 - y^2 - 1, y^2 - x^2 - 1 and 1 - x^2 - y^2 " subtr...

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  13. If one side of a square is represented by 18x - 20 and the adjacent si...

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  14. Find the median of the following data: 2,2,0,4,13,12,6,9,5,11

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  15. Compare the following exponentials by using gt or lt (i) 10^(-13) ...

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  16. In the given figure, AE || GF || BD, AB || CG || DF and angleCHE = 120...

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  17. Draw all lines of symmetry for each of the following figures as given ...

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  18. Two adjacent sides PS and RS of the parallelogram PQRS are 6 cm and 12...

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  19. In the given figure, QS bot PR, RT bot PQ and QS =RT Is triangle...

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  20. Following cards are kept on a table. What is the probability of g...

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  21. Chalk contains 10% calcium, 3% carbon and 12% oxygen. Find the amount ...

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