Question

6. If x= 1, y = -1, z=3, a = 1, b = -2, c = 2, find the value of
(a) ax² + by² - cz²​

Answer 1

Answer:

ax² + by² - cz²​ = 1 + (-2) - 18 = -19

Step-by-step explanation:

If x= 1, y = -1, z=3, a = 1, b = -2, c = 2

ax² + by² - cz²

= ax² = a × (x²)

= 1 × (1²)

= 1 × 1

= 1

= by² = b × (y²)

= -2 × (-1²)

= -2 × 1

= -2

= cz²​ = c × (z²)

= 2 × (3²)

= 2 × 9

= 18

ax² + by² - cz²​ = 1 + (-2) - 18

= 1 + (-2)

= -1

= -1 - 18

= -19

∴ ax² + by² - cz²​ = 1 + (-2) - 18

= -19

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