factorise. 1. y²-9x-10.
2. x²/25-y²/9. who knows how to put please answer
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Answered by
1
Answer:
1) (y-10)+(y+1)
2) (x/5+y/3)(x/5-y/3)
Step-by-step explanation:
1) y²-9y-10
= y²-(10-1)y-10
= y²-10y+y-10
= y(y-10)+1(y-10)
= (y-10)+(y+1)
2) (x²/25)-(y²/9)
= (x/5)²-(y/3)²
= (x/5+y/3)(x/5-y/3)
using formula x²-y² = (x+y)(x-y)
Answered by
2
Answer:
You are girl or boy ❤️❤️❤️❤️
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