Question

Sum of a number and it's half is 30 then the number is​

Answer 1

Step-by-step explanation:

This is what I think the method is X + 30= Xsquared

x- the number

the formula would be like this:

X^2+x=30

transpose 30:

X^2+x-30=0

then., i call this nxt step trial and error.,

(x+6)(x-5)=0

to get the equation., follow this steps

1. extract the square root of the first term., (x )(x )=0

2. think of factors of thr third term which will be equl to the numerical coefficient of the second term.,(x+6)(x-5)=0

last step would be... equate each binomial to zero to get the values of x...

x+6=0

x=-6

x-5=0

x=5

that's it! the values of x are: 5 & -6