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10. Algebraic Expressions
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Q65 of 100 Page 312

Subtract 9a2 – 15a + 3 from unity.

Unity means 1.

∴ 1 – (9a2 – 15a + 3)


= -9a2 + 15a – 2


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63

How much does 93p2 – 55p + 4 exceed 13p3 – 5p2 + 17p – 90?

64

To what expression must 99x3 – 33x2 – 13x – 41 be added to make the sum zero?

66

Find the values of the following polynomials at a = – 2 and b = 3:

(a) a2 + 2ab + b2


(b) a2 – 2ab + b2


(c) a3 + 3a2b + 3ab2 + b3


(d) a3 – 3a2b + 3ab2 – b3


(e)


(f)


(g)


(h) a2 + b2 – ab – b2 – a2

67

Find the values of following polynomials at m = 1, n = –1 and p = 2:

(a) m + n + p


(b) m2 + n2 + p2


(c) m3 + n3 + p3


(d) mn + np + pm


(e) m3 + n3 + p3 – 3mnp


(f) m2n2 + n2p2 + p2m2

Questions · 100
10. Algebraic Expressions
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