La segunda es
[tex] {a}^{2} + 5 a + 6[/tex]
[tex] {r}^{2} - 3r + 2[/tex]
La tercera es
[tex] {c}^{2} - 3c - 40[/tex]
La cuarta es
[tex] {r}^{2} + 10r + 25[/tex]
La quinta es
[tex] {a}^{2} - {b}^{2} [/tex]
La cesta es
[tex] {2x}^{2} + 2x - 24[/tex]
La séptima es
[tex] {6x}^{2} + 5x - 6[/tex]
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Verified answer
La segunda es
[tex] {a}^{2} + 5 a + 6[/tex]
La segunda es
[tex] {r}^{2} - 3r + 2[/tex]
La tercera es
[tex] {c}^{2} - 3c - 40[/tex]
La cuarta es
[tex] {r}^{2} + 10r + 25[/tex]
La quinta es
[tex] {a}^{2} - {b}^{2} [/tex]
La cesta es
[tex] {2x}^{2} + 2x - 24[/tex]
La séptima es
[tex] {6x}^{2} + 5x - 6[/tex]