factorise : f²-1+9g²-6fg
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Answered by
16
Answer:
(f-3g+1)(f-3g-1)
Step-by-step explanation:
f²-1+9g²-6fg
=(f²+9g²-6fg)-1
={(f)²+(3g)²-2×f×3g}-1
=(f-3g)²-(1)²
=(f-3g+1)(f-3g-1)
Answered by
0
Answer:
what is the meaning of factorise
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