So i need urgently. 15 points!
simplify b ( a + b ) - a ( a - b ).

a2 + 2 ab + b2
a2 - 2 ab + b2
- a2 + 2 ab + b2
- a2 - 2 ab - b2

-a² + 2ab + b² is your answer, or C).

Step-by-step explanation:

b(a + b) -a (a - b)

Distribute b to (a + b), and -a to (a - b)

b(a + b) = ab + b²

-a(a - b) = -a² + ab

Simplify. Combine like terms.

(-a² + ab) + (ab + b²) = -a² + 2ab + b²

-a² + 2ab + b² is your answer, or C).

~

-a^2 +2ab +b^2

Step-by-step explanation:

b ( a + b ) - a ( a - b )

Distribute

ba +b*b -a*a +a*b

ab +b^2 -a^2 +ab

Combine like terms

-a^2 +2ab +b^2

17 1/3

step-by-step explanation:

if a = 1,   and b = 2, then the answer is 47.99999999. if you round that to the nearest whole number, the answer is 48.