Question

please factorise x^2-7​

Answer 1

Answer:

$x {}^{2} - 7$

$(x) {}^{2} - ( \sqrt{7} ) {}^{2}$

$(x + \sqrt{7} )(x - \sqrt{7} )$

Answer 2

Answer:

Solving a Single Variable Equation :

    Solve  :    x2-7 = 0

Add  7  to both sides of the equation :

                     x2 = 7

When two things are equal, their square roots are equal. Taking the square root of the two sides of the equation we get:  

                     x  =  ± √ 7  

Step-by-step explanation:

X+$\sqrt{7}$ AND X-$\sqrt{7}$