Question

24. A table costs Rs. 5400. If the cost is increased to Rs. 6400, what is the percentage increase?

25. Multiply 2

(5x^2 6x 9) by (2x 3) -+ -

26. Find x, if x : 11 : : 26 : 13.​

Answer 1

Answer:

5x^2  (2x+3)+6x(2x+3)+9(2x+3)

10x^3 +15x^2  +6x(2x+3)+9(2x+3)

10x^3  +15x^2  +12x^2  +18x+9(2x+3)

10x^3  +15x^2  +12x^2  + 18x+18x+27

10x ^3 +(15x^2 +12x^2)+(18x+18x)+27

10x^3+27x^2 +36x+27

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