Answer:
49
Step-by-step explanation:
The expression is given below:
x^2 + 14x
Let y be the constant that will make the expression a perfect square. Therefore, the expression can be written as:
x^2 + 14x + y
Applying the formula b^2 = 4ac, we can easily obtain the value of y as shown below:
x^2 + 14x + y
Coefficient of x^2 (a) = 1
Coefficient of x (b) = 14
Constant (c) = y
b^2 = 4ac
14^2 = 4 x 1 x c
196 = 4c
Divide both side by the coefficient of c i.e 4
c = 196/4
c = 49
Thus, 49 must be added to the expression to make it a perfect square.
Answer:
1.) y = 1/2x -1.8 slope is 1/2 and y intercept is - 1.8
Step-by-step explanation:
1.) 5x - 10y = 18
<u> +10y +10y</u>
5x = 10y +18
<u>- 18 -18</u>
<u>5x - 10y</u> = <u>18</u>
<u> 10 10</u>
= 1/2x -1.8
