Simplify-m2-3 m-m2-4 m-3-m2-2 m-3-m2-9

The correct option is D m^2+3m=m(m+3) m^2+4m+3=(m+1)(m+3) m^2 2m 3=(m+1)(m 3) m^2 9=(m+3)(m 3) ∴m(m+3)/(m+1)(m+3)×(m+1)(m 3)/(m+3)(m 3) Cancelling the terms we ...

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Byju's Answer

Standard VIII

Mathematics

Division of an Expression by a Expression

Simplify:m2+3...

Question

Simplify:
$\frac{m^{2} + 3 m}{m^{2} + 4 m + 3} \times \frac{m^{2} - 2 m - 3}{m^{2} - 9}$

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Solution

The correct option is D
$m^{2} + 3 m = m (m + 3)$
$m^{2} + 4 m + 3 = (m + 1) (m + 3)$
$m^{2} - 2 m - 3 = (m + 1) (m - 3)$
$m^{2} - 9 = (m + 3) (m - 3)$
$∴ \frac{m (m + 3)}{(m + 1) (m + 3)} \times \frac{(m + 1) (m - 3)}{(m + 3) (m - 3)}$
Cancelling the terms we get $\Rightarrow \frac{m}{m + 3}$

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Similar questions

Match the following:

A		B
1)	(m + 2n) (m − 2n)	a)	m² − 16
2)	(3m + n) (3m − n)	b)	4m² − 25n²
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Simplify: m2+3mm2+4m+3×m2−2m−3m2−9

The correct option is D m2+3m=m(m+3) m2+4m+3=(m+1)(m+3) m2−2m−3=(m+1)(m−3) m2−9=(m+3)(m−3) ∴m(m+3)(m+1)(m+3)×(m+1)(m−3)(m+3)(m−3) Cancelling the terms we get ⇒mm+3

Simplify:
$\frac{m^{2} + 3 m}{m^{2} + 4 m + 3} \times \frac{m^{2} - 2 m - 3}{m^{2} - 9}$

The correct option is D
$m^{2} + 3 m = m (m + 3)$
$m^{2} + 4 m + 3 = (m + 1) (m + 3)$
$m^{2} - 2 m - 3 = (m + 1) (m - 3)$
$m^{2} - 9 = (m + 3) (m - 3)$
$∴ \frac{m (m + 3)}{(m + 1) (m + 3)} \times \frac{(m + 1) (m - 3)}{(m + 3) (m - 3)}$
Cancelling the terms we get $\Rightarrow \frac{m}{m + 3}$