Question

va ajut cu pct....va rog eu...ajutorrr...e pentru iubita mea :(

Answer 1

5. a. x²+8x+16+(x²-4x+4)-2x²=
x²+8x+16+x²-4x+4-2x²=
2x²+4x+20-2x²=
4x+20=4(x+5);
b. 4x²-12x+9-(9x²+30x+25)+4x²-25=
4x²-12x+9-9x²-30x-25+4x²-25=
-x²-42x-41;
c. x²+10x+25-(x²-4)+2(x²+2x+1)=
x²+10x+25-x²+4+2x²+4x+2=
2x²+14x+31;
d. 9+24x+16x²+4(x²-4x+4)-(x²-9)=
9+24x+16x²+4x²-16x+16-x²+9=
34+40x+19x²;