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12. Algebraic Expressions
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Q10 of 30 Page 242

What should be the value of a if the value of 2x2 + x - a equals to 5, when x = 0?

As x = 0


And


2x2 + x - a = 5


2(0)2 + 0 - a = 5


2(0) - a = 5


0 - a = 5


-a = 5


a = -5


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If z = 10, find the value of z3 – 3(z – 10)

9

If p = -10, find the value of p2 – 2p – 100

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Simplify the expression and find its value when a=5 and b = -3, then 2(a2 + ab) +3 - ab

1

Observe the patterns of digits made from line segments of equal length. You will find such segmented digits on the display of electronic watches or calculators.

(a)


(b)


(c)


If the number of digits formed is taken to be n, the number of segments required to form n digits is given by the algebraic expression appearing on the right of each pattern.


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Questions · 30
12. Algebraic Expressions
1 2 2 3 4 4 5 6 7 1 2 3 4 4 5 6 6 1 2 3 4 5 6 7 8 9 10 11 1 2
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