1. The problem is to evaluate the expression $3-(4,6)^2$. 2. First, clarify the notation: $(4,6)$ typically represents a point or vector, but here it seems to be a typo or misuse. Assuming you meant $3 - (4.6)^2$ (where 4.6 is a decimal number). 3. The formula to square a number is $a^2 = a \times a$. 4. Calculate $4.6^2$: $$4.6^2 = 4.6 \times 4.6 = 21.16$$ 5. Substitute back into the expression: $$3 - 21.16 = -18.16$$ 6. Therefore, the value of the expression is $-18.16$.