Simplify{ 450 \times450- 150 \times150}/ {450 +150} =?

RRB Non Technical Model Papers 8 with solutions

Question : 38 of 100

Marks: +1, -0

Simplify

{ 450 ×450- 150 ×150}/ {450 +150} =?

Solution:

(4) The given expression is

{450× 450 ×150 ×150}/{450+ 150}

={(450) ^2-(150)^2}/{(450 +150)}

={(450+ 150)(450 -150)}/{(450+ 150)}

=300

[∵ a^2 - b^2=(a–b)(a+b) ]

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