Try to explain: no matter what value x takes, the value of polynomial (2x & # 179; + 5x & # 178; + 4x-3) - (- X & # 178; + 3x & # 179; - 3x-1) + (4-7x-6x & # 178; + X & # 179;) will not change Try to explain: no matter what value x takes, the value of polynomial (2x & # 179; + 5x & # 178; + 4x-3) - (- X & # 178; + 3x & # 179; - 3x-1) + (4-7x-6x & # 178; + X & # 179;) will not change Be quick

Try to explain: no matter what value x takes, the value of polynomial (2x & # 179; + 5x & # 178; + 4x-3) - (- X & # 178; + 3x & # 179; - 3x-1) + (4-7x-6x & # 178; + X & # 179;) will not change Try to explain: no matter what value x takes, the value of polynomial (2x & # 179; + 5x & # 178; + 4x-3) - (- X & # 178; + 3x & # 179; - 3x-1) + (4-7x-6x & # 178; + X & # 179;) will not change Be quick

(2x³+5x²+4x-3)-（-x²+3x³-3x-1）+（4-7x-6x²+x³）
=2x³+5x²+4x-3+x²-3x³+3x+14-7x-6x²+x³
=(2-3+1)x³+(5+1-6)x²+(4+3-7)x-3+14
=0+0+0+11
=11
So no matter what value x takes, it doesn't change