Question

29. Factorise the following:
(i) 9x² + 4y2 + 1622 + 12xy - 16yz – 24xz
(ii) 25x² + 16y2 + 4z2 -- 40xy + 16yz - 20xz
(ii) 16x² + 4y2 + 9z2 - 16xy - 12yz + 24 xz​

Answer 1

Answer:9x²+4y²+16z²+12xy-16yz-24xz

⇒(3x)²+(2y)²+(4z)²+12xy-16yz-24xz

                                                                

 {Usingdentity→(a+b+c)²=a+b²+c²+

          2ab+2bc+2ca}

⇒(3x+2y-4z)²=9x²+4y²+16z²+12xy-16yz-24xz

∴Ans= (3x+2y-4z) (3x+2y-4z) 

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Answer 2

Step-by-step explanation:

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