Question

Answer 1

a: \(=4x^4+4x^3\)

b: \(=\left(6-3-12\right)\cdot ab=-9ab\)

c: \(=xy^2+x^2y-2xy^2=-xy^2+x^2y\)

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

e: \(=6xy+xy=7xy\)

e: \(=-x^2y^3z^4\)

g: \(=b^2\left(6-4+3\right)=b^2\cdot5\)

h: \(=-4x^2y\)

Answer 2

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a, \(x^4+3x^4+4x^3=4x^4+3x^3\)

d, \(x^2-5x^2+2x^3=-4x^2+2x^3\)

g, \(6b^2-4b^2+3b^2=5b^2\)

b, \(6ab-3ab-12ab=-9ab\)

e, \(xy+xy+5xy=7xy\)

h, \(4x^2y-8x^2y=-4x^2y\)

c, \(xy^2+x^2y-2xy^2=-xy^2+x^2y\)

f, \(3x^2y^3z^4-4x^2y^3z^4=-x^2y^3z^4\)