Teaching PSTET Paper 1 & 2 Mock Test 2024 Quantitative Aptitude Algebra Identities

ਇਸ ਪ੍ਰਗਟਾਵ ਨੂੰ ਸਰਲ ਬਣਾਓ:

(c + d)2 - (c - d)2

1
4cd
2
(c2 + d2)
3
2(c2 + d2)
4
2cd
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