Explicación paso a paso:
[tex](x + y)(x - y) = {x}^{2} - {y}^{2} [/tex]
3.
[tex](2p - q)(2p + q) = 4 {p}^{2} - 2pq + 2pq - {q}^{2} = 4{p}^{2} - {q}^{2} [/tex]
4.
[tex](3x - y)(3x + y) = 9 {x}^{2} + 3xy - 3xy - {y}^{2} = 9 {x}^{2} - {y}^{2} [/tex]
5.
[tex](2p - 5)(2p + 5) = 4 {p}^{2} - 10p + 10p - 25 = 4 {p}^{2} - 25[/tex]
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Explicación paso a paso:
[tex](x + y)(x - y) = {x}^{2} - {y}^{2} [/tex]
3.
[tex](2p - q)(2p + q) = 4 {p}^{2} - 2pq + 2pq - {q}^{2} = 4{p}^{2} - {q}^{2} [/tex]
4.
[tex](3x - y)(3x + y) = 9 {x}^{2} + 3xy - 3xy - {y}^{2} = 9 {x}^{2} - {y}^{2} [/tex]
5.
[tex](2p - 5)(2p + 5) = 4 {p}^{2} - 10p + 10p - 25 = 4 {p}^{2} - 25[/tex]