Question

Factorise 12x+y^2-z^2-6xy+20yz-6zx​

Answer 1

Answer:

9x2 + y2 + z2 - 6xy + 2yz - 6zx

= (3x)2 + y2 + z2 - 2 3x y + 2yz - 2 z 3x

= (3x - y - z)2

{Using (a-b-c)2=a2+b2+c2-2ab+2bc-2ca}

When x=1,y=2 and z=-1,

9x2 + y2 + z2 - 6xy + 2yz - 6zx

= (3x - y - z)2

= [3(1) - 2 - (-1)]2

= (3 - 2 + 1)2 = 22 =

Solve further urself..

xD

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Step-by-step explanation:

Answer 2

A neutralization reaction is when an acid and a base react to form water and a salt and involves the combination of H+ ions and OH- ions to generate water.