Question

What is the solution set to the equation x2 + 10x = –21?



{–3, –7}


{3, 7}

{–21, –31}


{0, –10}

Answer 1

There are three types of method to solve it
1)Factorisation method
2)completing the square
3)quadratic formula
we will use the first method bcoz it is faster

Answer 2

First shift all the values to the left side

Answer 3

It is (-3, -7)

Answer 4

\[x^2+10x+21=0\]

Answer 5

ok whats next?