QUANTITATIVE APTITUDE If (x^{3}-2 \\sqrt{2} y^{3} ) \\div(x-\\sqrt{2} y) = (A x^{2}+B x y+C y^{2} ) then (2 A+4 \\sqrt{2} B-4 C)=?

SSC CGL 7 06 2019 Shift 2 Paper

Question : 51 of 100

Marks: +1, -0

QUANTITATIVE APTITUDE

\ (x^{3}-2 \√{2} y^{3}\ ) \÷(x-\√{2} y)

=\ (A x^{2}+B x y+\

\ C y^{2}\ )

then

(2 A+4 \√{2} B-4 C)=?

Solution:

\ (x^{3}-2 \√{2} y^{3}\ ) \÷(x-\√{2} y)

=\ (x^{2}+2 y^{2}+\√{2} x y\ )

=A x^{2}+C y^{2}+B x y

A=1 ; B=\√{2} ; C=2

Now,

2 A+4 \√{2} B-4 C

=2+8-8=2

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