Question

por favor necesito ayuda con esto​

Answer 1

Explicación paso a paso:

1)

[tex](7m + 9)(7m - 9) \\ = 49 {m}^{2} - 63m + 63m - 81 \\ = 49 {m}^{2} - 81[/tex]

2)

[tex](a + 2 {b}^{3} )(a - 2 {b}^{3} ) \\ = {a}^{2} - 2a {b}^{3} + 2a {b}^{3} - 4 {b}^{9} \\ = {a}^{2} - 4 {b}^{9} [/tex]

3)

[tex]( {g}^{2} - 3g)( {g}^{2} + 3g) \\ = {g}^{4} + 3 {g}^{3} - 3 {g}^{3} - 9 {g}^{2} \\ = {g}^{4} - 9 {g}^{2} [/tex]

4)

[tex](x {y}^{4} + z)(x {y}^{4} - z) \\ = {x}^{2} {y}^{16} - zx {y}^{4} + zx {y}^{4} - {z}^{2} \\ = {x}^{2} {y}^{16} - {z}^{2} [/tex]

5)

[tex]( {x}^{3} + 4x)( {x}^{3} - 4x) \\ = {x}^{9} - 4 {x}^{4} + 4 {x}^{4} - 16 {x}^{2} \\ = {x}^{9} - 16 {x}^{2} [/tex]

1)

[tex] {x}^{4} - 16 \\ = ( {x}^{2} + 4)( {x}^{2} - 4)[/tex]

2)

[tex] {b}^{2} - 1 \\ = (b + 1)(b - 1)[/tex]

3)

[tex] {x}^{6} - 121 \\ ( {x}^{3} + 11)( {x}^{3} - 11)[/tex]

4)

[tex] - {x}^{2} + 4 \\ = ( - x - 2)(x - 2)[/tex]

5)

[tex]4 {x}^{2} - 64 {y}^{4} \\ = (2x + 8 {y}^{2} )(2x - 8 {y}^{2} )[/tex]