Question

va rog rezolvare doar cele 2 marcate​

Answer 1

(2x+1)²+(3x-2)²-13x(x-1)

(4x²+4x+1)+(9x²-12x+4)-13x²+13x

4x²+4x+1+9x²-12x+4-13x²+13x

5x+5

5(x+1)

(7x+2)²-(5x-3)²-2x(7x+29)

(49x²+28x+4)-(25x²-30x+9)-14x²-58x

49x²+28x+4-25x²+30x-9-14x²-58x

10x²-5

5(2x²-1)