Uprość wyrażenia: a) (2x-3)(x+7) b)(4-5y)(1-6y)
a) (2x-3)(x+7)= 2x^2 + 14x -3x -21 = 2x^2 + 11x - 21
b) (4-5y)(1-6y)= 4 - 24y - 5y - 30^2 = 4 - 29 y - 30y^2
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a) (2x-3)(x+7)= 2x^2 + 14x -3x -21 = 2x^2 + 11x - 21
b) (4-5y)(1-6y)= 4 - 24y - 5y - 30^2 = 4 - 29 y - 30y^2