12. 4x2 - 4y2 + 1622 - 16xz
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Answer:
24.8x2 + 2244 - 32xz
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Explanation:
4x2+9y2 +16z2 +12xy- 24yz -16xz Using identity, (a + b+ c)2 = a2 + b2 + c2 +2ab + 2bc +2ca 4x2 +9y2 +16z2 +12xy 24yz - 16xz (2x)2 +(3y)2 + (-4z)2 + (2*2x*3y) + (2x3yx-4z)+ (2x-4zx2x) = (2x+ 3y -42)2 (2x+3y -42) (2x +3y -42) (i) 2x2+ y2 +8z2 -2v2 xy +4V2 yz -8xz Using identity, (a +b +c)2 = a2 + b2 + c2 +2ab + 2bc + 2ca 2x2 +y2 +8z2 -2v2 xy +4V2 yz -8xz = (-v2x)2 + (y)2 + (2v2z)2 + (2x-V2xxy) + (2xyx2- 2z) + (2x2W2zx-V2x) (-V2x +y+2v2z)2 (-V2x +y +2 2z) (-V2x +y +2 2z) HOPE IT HELPS YOU.. PLS MARK ME AS BRAINLIEST...
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