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(−2×√(3)−5×√(2))×(−5×√(2)+2×√(3))

Răspuns :

(-2√3-5√2)(-5√2+2√3)=(-5√2-2√3)(-5√2+2√3)=(-5√2)²-(2√3)²=25·2-4·3=50-12=38