Question

aduceti la cea mai simpla formă expresia: (2x+3) totul la a doua +(3x-1) (3x+1)-(3x-1) totul la a doua +(2x-3)•(5x+4) dau coroana urgent

Answer 1

(2x+3)²+(3x-1)(3x+1)-(3x-1)²+(2x-3)•(5x+4)=

(2x)²+2•2x•3+3²+(3x)²-1-(3x)²+2•3x-1+10x²+8x-15x-12=

2²x²+2•2x•3+3²+3²x²-1-3²x²+2•3x-1+10x²+8x-15x-12=

4x²+12x+9+9x²-1-9x²+6x-1+10x²+8x-15x-12=

(4x²+9x²-9x²+10x²)+(12x+6x+8x-15)+(9-1-1-12)=

4x²+10x²+11x-5=

(4x²+10x²)+11x-5=

14x²+11x-5