Factorise 9x²+5²+z²-6xy+2yz-6xz hence find its value when x=1 y=2 and z=-1
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Answered by
1
answer is 25
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Answered by
0
Answer:
Now
putting the value of x, y, z
Step-by-step explanation:
=9*1+25+1-6*1*2+2*2*1-6*1*1
=9+25+1-12+4-6
=35-14
=21
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