Question

Factorize the given expression:
9x? + 49y? + 252? - 42xy - 30xz + 70yz
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Answer 1

Answer:

the question should be 9x?+49y²-42xy-30xz+70yz + 25z?

if so then....

(3x)? + (7y)? + (5z)? - 2(3x)(7y) -(2)(3x)(5z) +

(2)(7y)(5z)

as the negative sign is with x variable, therefore

=> (-3x)2 + (7y)? + (5z)? + 2(-3x)(7y) + (2) (-3x)(5z) + (2)(7y)(5z)

= (-3x+7y+5z) (-3x +7y +5z)

Answer 2

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Refer the Attachment !