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Factorisation by Common Factors

Question 1iii...

Question

Question 1(iii)
Factorise the following expressions
$25 m^{2} + 30 m + 9$

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Solution

$25 m^{2} + 30 m + 9 = (5 m)^{2} + 2 \times 5 m \times 3 + (3)^{2} = (5 m + 3)^{2} [(a + b)^{2} = a^{2} + 2 a b + b^{2}]$

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Q. Question 1(iii)
Factorise the following expressions

25 m^{2} + 30 m + 9

25 m^{2} + 30 m + 9

25 m^{2} + 30 m + 9

25 m^{2} + 30 m + 9

What will come in place of the question mark (?) in the following questions?

$9^{7} \times 3^{6} \div 9^{2.4} = 9^{?}$

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Factorisation by Common Factors

Standard VIII Mathematics

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