Is this right and i need getting the decimal estimate

The answer of 12 to 13 is almost correct - you only forgot the - signs

As for the decimal estimate, take the square root of 12 (144) and the square root of 13(169) and because 150 is closer to 144 than 169 we can guess that the decimal is about -12.2

where r the answers

step-by-step explanation:

answer: -2+√x,-2-√x

i hope this , i don't know if you're looking for a pair or not.