Question

cho f(x) 2x⁴+5x³-x+8

      g(x)=x⁴-x²-3x+9

tìm h(x) sao cho

a)f(x)-h(x)=g(x)

b)h(x)-g(x)=f(x)

Answer 1

a \(f\left(x\right)-h\left(x\right)=g\left(x\right)\)

\(h\left(x\right)=f\left(x\right)-g\left(x\right)\)

\(h\left(x\right)=\left(2x^4+5x^3-x+8\right)-\left(x^4-x^2-3x+9\right)\)

\(h\left(x\right)=2x^4+5x^3-x+8-x^4+x^2+3x-9\)

\(h\left(x\right)=3x^4+5x^3+x^2+2x-1\)

 

b \(h\left(x\right)-g\left(x\right)=f\left(x\right)\)

\(h\left(x\right)=f\left(x\right)+g\left(x\right)\)

\(h\left(x\right)=2x^4+5x^3-x+8+x^4-x^2-3x+9\)

\(h\left(x\right)=3x^4+5x^3-x^2-4x+17\)