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प्रश्न
Subtract: −xy + yz − zx from xy − yz + xz
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उत्तर
Find the value of (xy + yz + zx) − (−xy + yz − zx)
We need to subtract (−xy + yz − zx) from (xy – yz + zx)
= (xy – yz + zx) − (−xy + yz − zx)
= xy – yz + zx + xy – yz + zx
= xy + xy – yz – yz + zx + zx
= 2xy − 2yz + 2zx
the answer is (2xy − 2yz + 2zx)
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