Question
an rectangular whiteboard has an area of x^2 -12x -45 wich expression could represent the width of the board
A) x-45
B) x-3
C)x+3
D) x+15
A) x-45
B) x-3
C)x+3
D) x+15
Answers
GPT 3.5
To find the width of the rectangular whiteboard, we need to find the dimensions that multiply together to give us the area of x^2 - 12x - 45.
We can factor the expression x^2 - 12x - 45 to find its dimensions:
x^2 - 12x - 45 = (x - 15)(x + 3)
Thus, the width of the board is equal to x - 15.
Therefore, the correct expression that represents the width of the board is D) x + 15.
We can factor the expression x^2 - 12x - 45 to find its dimensions:
x^2 - 12x - 45 = (x - 15)(x + 3)
Thus, the width of the board is equal to x - 15.
Therefore, the correct expression that represents the width of the board is D) x + 15.