by GeradHum » Thu Jun 05, 2025 1:01 pm
First, from a2+2=2aa^2 + 2 = 2aa2+2=2a, we get:
a2−2a+2=0a^2 - 2a + 2 = 0a2−2a+2=0
Now plug into the expression:
a4−a3+a2+2=0(after simplifying using the equation above)a^4 - a^3 + a^2 + 2 = 0 \quad \text{(after simplifying using the equation above)}a4−a3+a2+2=0(after simplifying using the equation above)
Answer: 0
For the second part:
(x−1)(x−2)(x+3)(x+4)+7=(x2+2x−3)(x2+7x+12)+7(x - 1)(x - 2)(x + 3)(x + 4) + 7 = (x^2 + 2x - 3)(x^2 + 7x + 12) + 7(x−1)(x−2)(x+3)(x+4)+7=(x2+2x−3)(x2+7x+12)+7
Multiply and simplify — the expression is factorable, but it requires expansion.