Question

упростите выражение (6a-b)^2-(9a-b)(4a+2b)

Answer 1

(6a-b)^2-(9a-b)(4a+2b)=36a²-12ab+b²-(36a²+18ab-4ab-2b²)=36a²-12ab+b²-(36a²+14ab-2b²)=36a²-12ab+b²-36a²-14ab+2b²=-26ab+3b²