Question

please help me I
${x}^{2} - {y}^{2} + 4y - 4$
​

Answer 1

Answer:

${x}^{2} - {y}^{2} + 4y - 4 \\ \\ {x}^{2} - ( {y}^{2} .2.y.y + {2}^{2} ) \\ \\ {x}^{2} - (y - 2) {}^{2} \\ \\ (x + y - 2)(x - y + 2)$

Answer 2

Answer:

hope it's was helpful to you