Sagot :
[tex] {(x + 7) }^{2} - > (a + b {)}^{2} = a {}^{2} + 2ab + b {}^{2} [/tex]
[tex](x + 7 {)}^{2} - 25 = x {}^{2} + 14x + 49 - 25 = x {}^{2} + 14x + 24[/tex]
[tex] {(x + 7) }^{2} - > (a + b {)}^{2} = a {}^{2} + 2ab + b {}^{2} [/tex]
[tex](x + 7 {)}^{2} - 25 = x {}^{2} + 14x + 49 - 25 = x {}^{2} + 14x + 24[/tex]