Question

If z = -5, then find the value of z2 – (z – 5).
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Answer 1

Answer:

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Answer 2

z2-(z-5)

z=-5

(-5)2-(-5-5)

-10+5+5

-10+10

= 0 (Answer)

OR

z²-(z-5)

z=-5

(-5)²-(-5-5)

25+5+5

25+10

= 35 (Answer)