( 6 s - 5 t )²- ( 3t+2s)²- 8 ( s- 2t ) ( s- 7 t) упрости выражение

Question

( 6 s - 5 t )²- ( 3t+2s)²- 8 ( s- 2t ) ( s- 7 t) упрости выражение

Answer 1

(6s-5t)²-(3t+2s)²-8(s-2t)(s-7t)=36s²-60st+25t²-9t²-12st-4s²-8(s²-7st-2st+14t²)=32s²-72st+16t²-8s²+72st-14t²=24s²+2t²