poprosze o wykonanie działań: a) (5p+3q)^2-25 b)(2x+3)^2-(x-1)^2
a) (5p+3q)² -25 = 25p²+30pq+9q²-25
b)(2x+3)² -(x-1)² = 4x²+12x+9-(x²-2x+1) = 4x²+12x+9-x²+2x-1 = 3x²+14x+8
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a) (5p+3q)² -25 = 25p²+30pq+9q²-25
b)(2x+3)² -(x-1)² = 4x²+12x+9-(x²-2x+1) = 4x²+12x+9-x²+2x-1 = 3x²+14x+8