lilybree18
lilybree18
14-09-2021
Mathematics
contestada
Someone help plz? Will mark brainiest!
Respuesta :
ang12321
ang12321
14-09-2021
2. (a＋b)²＝a²＋2ab＋b²
(5x－2)²＝(5x)²－2×5x×2＋2²
(5x－2)²＝25x²－20x＋4
4. (a＋b)²＝a²＋2ab＋b²
(2x＋5)²＝(2x)²＋2×2x×5＋5²
(2x＋5)²＝4x²＋20x＋25
∵a＝4, b＝20, c＝25
∴a＋b＋c＝4＋20＋25＝49
Hope my answer helped u :)
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