Question

Answer this one fast​

Answer 1

Answer:

1/4

Step-by-step explanation:

From the given equation we get,

$49x^{2} - b = (7x + \frac{1}{2})(7x - \frac{1}{2}) \\ \\ 49 {x}^{2} - b = {(7x)}^{2} - ( { \frac{1}{2} )}^{2} \\ 49 {x}^{2} - b = 49 {x}^{2} - \frac{1}{4} \\ - b = - \frac{1}{4} \\ b = \frac{1}{4}$

Answer 2

Answer:

1/4

Step-by-step explanation:

From the given equation we get,

\begin{gathered}49x^{2} - b = (7x + \frac{1}{2})(7x - \frac{1}{2}) \\ \\ 49 {x}^{2} - b = {(7x)}^{2} - ( { \frac{1}{2} )}^{2} \\ 49 {x}^{2} - b = 49 {x}^{2} - \frac{1}{4} \\ - b = - \frac{1}{4} \\ b = \frac{1}{4} \end{gathered}

49x

2

−b=(7x+

2

1

)(7x−

2

1

)

49x

2

−b=(7x)

2

−(

2

1

)

2

49x

2

−b=49x

2

−

4

1

−b=−

4

1

b=

4

1