Question

16.) (2x⁵y²)(4xy³) + (x⁴y⁴)(3x²y)

Answer 1

Again, I'm really not sure if this is right, and please tell me where I got it wrong if I did.

16. $11x^{6} y^{5}$

17. $18a^{4} b^{6}$

I really hope this helps, and I feel really bad when someone asks me to help and I can't :((

Answer 2

16) Answer: $11x^6y^5$

$\left(2x^5y^2\right)\left(4xy^3\right)+\left(x^4y^4\right)\left(3x^2y\right)$

$=2x^5y^2\cdot \:4xy^3+x^4y^4\cdot \:3x^2y$

$=8x^6y^5+3x^6y^5$

$=11x^6y^5$

17) Answer: $18a^4b^6$

$\left(4a^3b^4\right)\left(5ab^2\right)+\left(a^2b^5\right)\left(-2a^2b\right)$

$=4a^3b^4\cdot \:5ab^2-a^2b^5\cdot \:2a^2b$

$=20a^4b^6-2a^4b^6$

$=18a^4b^6$