1) (3+х) (х-3) =х²-9
2) (3b-5) (3b+5)=9b²-25
3) (5x+8y)(8y-5x)= 64y²-25x²
Ответ:
1)
2)
3)
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1) (3+х) (х-3) =х²-9
2) (3b-5) (3b+5)=9b²-25
3) (5x+8y)(8y-5x)= 64y²-25x²
Ответ:
1)
2)
3)