Question

32) Simplify 3x (4x-5) + 3 and find its values for (1) * = 3 (11)x=1/2
33) Find the value of m, for which 5-5= 56
34) Express the following numbers in standard form: 0 000035
4x 6 =24
Q. IV. SOLVE THE FOLLOWING
35) Find the length of the side of a square whose area is 441 m².
36) Find the cube root of 8000.
37) Using (x+a) (x+b) = x++ (a+b) x + ab, find 103 104.
38) Classify the following polynomials as monomials, binomials, trinomials. (x+y, 1000, 7+y+5x, 2y-3y?,
2y-3y +4y), 5x-4y+3xy, 47-152", par, p’q+pq?, 2p+29
39) (a -b) (a+b) + (b-c) (b+c) + (c-a) (c+a) = 0
40) In a stack there are 5 books each of thickness 20mm and 5 paper sheets each of thickness 0.016 mm
What is the total thickness of the stack?

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Answer 1

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Answer 2

:

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-- :

3x(4x−5)+3=12x^2−15x+3

x=3 gives the value 12(9)−15×3+3

                             =108−45+3

                              =66

x=1/2 gives the value 12(1/4)−15×(1/2)+3

                             =3−7.5+3

                              = - 3/2