вычислите наиболее рациональным путем:
[tex]7,2 {}^{2} + 2 \times 7,2 \times 2,8 + 2,8 {}^{2} [/tex]
[tex]7,2 {}^{2} + 2 \times 7,2 \times 2,8 + 2,8 {}^{2} [/tex]
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7.2²+2•7.2•2.8+2.8² = (7.2+2.8)² = 10² = 100