Question

simplify (x+y-z) (x+y+z)

class 8​

Answer 1

Answer:

• ( x + y + z ) ( x + y - z )
• ( x + y )^2 - ( z )^2

identity: - a^2 - b^2

Step-by-step explanation:

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Answer 2

$(x + y - z) \: ( x + y + z) \\ \\ note \: = \: multiply \: on \: both \: side \\ \\ = > {x}^{2} + xy - xz \\ \\ = > yx + {y}^{2} - yz \\ \\ = > - zx - zy - {z}^{2} \\ \\ = > {x}^{2} - {y}^{2} - 2yz - {z}^{2} \: is \: the \: answer$