TS Police Constable Telugu Model Paper 2

Question : 56 of 200

Marks: +1, -0

x=2-p

అయిన

x^3+6xp+p^3

విలువ దీనికి సమానం

Solution:

x=2-p

⇒x+p=2

x^{3}+6 x p+p^{3}

=x^{3}+3 x p × 2+p^{3}

=x^{3}+3 x p(x+p)+p^{3}

=(x+p)^{3}=(2)^{3}=8

[∴(a+b)^{3}=a^{3}+3 a b(a+b)+b^{3}]

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