Ответ:
(2+4)^2=4+16х+16х^2
По формуле (a+b)² = a² + 2*a*b + b²
(2+4х)² = 2² + 2*2*4х + (4х)² = 4+16х+16x²
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Ответ:
(2+4)^2=4+16х+16х^2
По формуле (a+b)² = a² + 2*a*b + b²
(2+4х)² = 2² + 2*2*4х + (4х)² = 4+16х+16x²