Question

Спростить вираз (5х+2у)стпень2 Помогите СРОЧНО

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Answer 1

(5x + 2y)^2 = (5x + 2y)(5x + 2y)

= (5x)(5x) + (5x)(2y) + (2y)(5x) + (2y)(2y)

= 25x^2 + 10xy + 10xy + 4y^2

= 25x^2 + 20xy + 4y^2