Respuesta :
Answer:
The error made by the student was that they didn't distribute the 7 first, they just added -2 and 7. The correct way would be to distribute first:
-2+7(x+8)
-2+7x+56
54+7x
*Hey! Hope this helped : )*
Answer:
7x + 54
Step-by-step explanation:
Given
- 2 + 7(x + 8)
The student made the error of adding before multiplying, that is
- 2 + 7 = 5 , then multiplying (x + 8) by 5
However, multiplication is performed before addition/ subtraction, thus
- 2 + 7(x + 8) ← distribute by 7
= - 2 + 7x + 56 ← collect like terms
= 7x + 54
