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प्रश्न
−70 + 20 = `square` − 10
बेरीज
उत्तर
L.H.S = −70 + 20 = −50
R.H.S = `square` −10
⇒ `square` = −50 + 10 = −40
−70 + 20 = −40 − 10
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