1)(0,2a-1.3b)(2a+1.3b)=0,04a²-1,69b²
3)(a⁵-b²)(a⁵+b²)=a¹⁰-b⁴
5)(7t²-3y)(7t²+3y)=49t⁴-9y²
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1)(0,2a-1.3b)(2a+1.3b)=0,04a²-1,69b²
3)(a⁵-b²)(a⁵+b²)=a¹⁰-b⁴
5)(7t²-3y)(7t²+3y)=49t⁴-9y²