Question

descompuneți in factori
x²-13x+42
x²-9x-22
x²-15x-100
x²-23x-50
x²+11x-26
x²+16x-80
x²+19x-20
dau coroană

Answer 1

1. x²-13x+42 = (x - 7)( x - 6)          2. x²-9x-22 = ( x -11)( x+ 2)

3. x²-15x-100 = ( x - 20)( x+ 5)     4. x²-23x-50 = ( x - 25)( x+ 2)

5. x²+11x-26 = ( x+ 13) ( x- 2)       6. x²+16x-80= ( x+ 20) ( x- 4)

6. x²+19x-20 = ( x+ 20)( x-1)