Answer:
-20x^2 + 56x - 15
Explanation:
3x(−2+7)−5(x−1)(4x−3)
Add −2 and 7 to get 5.
3x×5−5(x−1)(4x−3)
Multiply 3 and 5 to get 15.
15x−5(x−1)(4x−3)
Use the distributive property to multiply −5 by x−1.
15x+(−5x+5)(4x−3)
Apply the distributive property by multiplying each term of −5x+5 by each term of 4x−3.
15x−20x^2+15x+20x−15
Combine 15x and 20x to get 35x.
15x−20x^2+35x−15
Combine 15x and 35x to get 50x.
50x−20x^2−15
Swap terms.
-20x^2 + 56x - 15