Hi there!
#10 write w/o parentheses (-3w^3/u^2)^3
Distribute:
-27w^9/u^6
,#11 rewrite w/o exponent (2/7)^-1
Flip it:
7/2
, #12 simplify (x^-2)^4
Multiply those exponents:
x^-8
= 1/x^8
, #13 simplify 9y^-7 y^7u^9w^-4*3w^-8*2u^-8
Group terms:
9 *3* 2*y^(-7+7) * u(9-8) * w(-4-8)
= 54uw^-12
= 54u / w^12
, #14 simplify (-y^2+9y)+(8y^2-8y-7)-(-5y^2+3y+2)
Distribute the minus sign:
(-y^2+9y)+(8y^2-8y-7)+5y^2-3y-2
Combine like terms:
12y^2 - 2y- 9
#15 perform multiplications 2y^7u^4*2y*5u^2
2*2*5*y^7*y*u^4*u^2
= 20y^8u^6
, # 16 simplest form w/o parentheses (x+3)(x-6)
FOIL:
x^2 - 6x + 3x - 18
= x^2 - 3x - 18
Let me know if you have any questions before you Accept. Thanks,
Scott
MIT Graduate
College degree in math... proficient in all levels -- from algebra to calculus