Question

X square + 40 X + 49

Answer 1

thus is quadratic equation
${x}^{2} + 7x + 7x + 49 \\ x(x + 7) + 7(x + 7) \\ (x + 7)(x + 7)$
so both zeroes are -7,-7

hope this will help u

Answer 2

A mistake in the typing of question. It is x² + 14x + 49

So this can be factorised using Splitting the middle term method.

14 x can be split as 7 x and 7 x which on adding gives the middle term and on multiplying gives the constant term as product.

=> x² + 7 x + 7 x + 49

=> x ( x + 7 ) + 1 ( x + 7 )

=> ( x + 1 ) ( x + 7 )

This is the final solution.

If it needs to be further calculated for value of x you can equate the above equation to zero.

We get,

x + 7 = 0

=> x = ( - 7 )

x + 1 = 0

=> x = ( - 1 )