factorise 81 - a power 4 x power 2
Attachments:
Answers
Answered by
0
Step-by-step explanation:
81=9×9=9^2
9^2-a^4x^2
(9-a^2x)^2
Answered by
0
Step-by-step explanation:
81-a⁴x²
=9²-(a²)²×x²
=(9)²-(a²x)²
applying identity a²-b²=a-b×a+b
=(9+a²x)(9-a²x)
Similar questions