find the value of 2x2- 3y2 + z2
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Answered by
0
Step-by-step explanation:
=2x2- 3y2 + z2
=4- 3y2 + z2
=z2- 3y2-4
Answered by
8
Step-by-step explanation:
=(2x²)-(3y²)+(z²)
=(2×1×1)-(3×2×2)+(5×5)
=(2-12)+25
=(-10+25)
=15
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