1.
[tex]x {}^{2} - 121 = (x - 11)(x + 11)[/tex]
2.
[tex]64 - x {}^{2} = (8 - x)(8 + x)[/tex]
3.
[tex]36x {}^{2} + 16y {}^{2} = 4(9x {}^{2} + 4y {}^{2} )[/tex]
4.
[tex]25x {}^{2} - 4y {}^{2} = (5x - 2y)(5x + 2y)[/tex]
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1.
[tex]x {}^{2} - 121 = (x - 11)(x + 11)[/tex]
2.
[tex]64 - x {}^{2} = (8 - x)(8 + x)[/tex]
3.
[tex]36x {}^{2} + 16y {}^{2} = 4(9x {}^{2} + 4y {}^{2} )[/tex]
4.
[tex]25x {}^{2} - 4y {}^{2} = (5x - 2y)(5x + 2y)[/tex]