Find the value of the following without actual multiplication (3x-4y+z – InterviewSolution

1.

Find the value of the following without actual multiplication (3x-4y+z) (3x-4y-z)

Answer»

Answer:

9x^2 - 24xy + 16y^2 - Z^2

Step-by-step explanation:

TAKE 3X - 4y as a and z as b, then given expression becomes:

(a + b) (a - b)

= a^2 - b^2

= (3x - 4y)^2 - z^2

= 9x^2 -24xy + 16y^2 - z^2

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