Question

Jenny

求解，謝謝🙏

(a+b)-15 (a+b) (a−b) + 14 (a - b)²

國二數學

Answer 1

Daniel,Lo

令（a+b）=A;(a-b)=B
A²-15AB+14B²=(A-B)(A-14B)
=2b(-13a+15b)= 30b²-26ab

Answer 2

樹

算式

Answer 3

211228

我算的，看對不對