Question

25x; factorise 25 x square + 16 y square + 4 x square minus 40 X Y + 16 Y Z - ​

Answer 1

Step-by-step explanation:

20xz

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ANSWER

25x

2

+16y

2

+4z

2

−40xy+16yz−20xz

= (−5x)

2

+(4y)

2

+(2z)

2

+2(−5x)(4y)+2(4y)(2z)+2(−5x)(2z)

Suitable identities is (x+y+z)

3

=x

3

+y

3

+z

3

+2xy+2yz+2xz

Therefore, (−5x)

2

+(4y)

2

+(2z)

2

+2(−5x)(4y)+2(4y)(2z)+2(−5x)(2z)

= (−5x+4y+2z)

2