You cannot factor it, so there is no simplification. The Constants "4" and "9" do not share a common factor, therefore, you cannot simplify it. However, if it was a number such as "8" replacing "9", then you can simplify by doing:
4(x^2 - 2) = 4x^2-9
Answer: because teachers decides that this society needed to not only screw with kids mentally but completely confuse them mathematically wise.
Step-by-step explanation:
Answer:
x=21
Step-by-step explanation:
![2(2x+3)=90\\2x+3=45\\2x=42\\x=21](https://tex.z-dn.net/?f=2%282x%2B3%29%3D90%5C%5C2x%2B3%3D45%5C%5C2x%3D42%5C%5Cx%3D21)
Just color one intire grid and thirty five units on the other.