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OpenStudy (wheelchairgirl):
I really need help solving this and can you show all steps... (2√5+3√7)^2
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OpenStudy (mertsj):
\[(2\sqrt{5}+3\sqrt{7})(2\sqrt{5}+3\sqrt{7})\]
OpenStudy (mertsj):
Use FOIL
OpenStudy (blurbendy):
2sqrt[5] * 2sqrt[5] = 4sqrt[25] = 4 * 5 = 20 2sqrt[5] * 3sqrt[7] = 6sqrt[35] 2sqrt[5] * 3sqrt[7] = 6sqrt[35] 3sqrt[7] * 3sqrt[7] = 9sqrt[49] = 9 * 7 = 63 20 + 6sqrt[35] + 6sqrt[35] + 63 = 83 + 12sqrt[35]
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