The square root of number that is two bigger than k is twice as big as the square root of the number one less than k. What is k

K = 2

Step-by-step explanation:

Rewriting the expression mathematically;

√(k+2)=2√(k-1)

square both sides

k+2=4(k-1)

k+2=4k-4

Collect like terms

2+4=4k-k

6=3k

Dibaide both sides by 3

3k/3 = 6/3

k = 2

because linear equations are a lot simpler than quadratics equations, and linear equations formula is a lot easier to memorize. that's why i think they're harder.

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.