Răspuns:
Explicație pas cu pas:
(8x - 3y)^2 = 64x^2 - 48xy + 9y^2
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(5√2 + 2√3)^2 = 50 + 20√6 + 12 = 62 + 20√6
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(7x + 2y)^2 = 49x^2 + 28xy + 4y^2
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(√8 - 3√6)^2 = 8 - 6√48 + 54 = 62 - 24√3
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(4 - 2√3)(4 + 2√3) = 16 - 12 = 4
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(11 + x)(11 - x) = 121 - x^2