Question

Substract a2 - b2 from b2 - a2​

Answer 1

(2−12)−1(2−12)

(a^{2}-1b^{2}){\color{#c92786}{-1(a^{2}-1b^{2})}}(a2−1b2)−1(a2−1b2)

(2−12)−12+2