Math, asked by madhvishukla85417, 6 hours ago

9. If a = -2, b= -3 and c=2 then find the value of each of the following. (1) a2 + b2 +c2 (i) 4abc (iii) ab + bc + ca (iv) 3ab-4bc +5ca (v) ab +9
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Answers

Answered by topto6216
1

Step-by-step explanation:

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Answered by devishri1977
1

Answer:

Step-by-step explanation:

i) a² + b² + c² = (-2)² + (-3)² + 2²

                     = 4 + 9 + 4

                     = 17

ii) 4abc = 4*(-2)*(-3)*2

              = 48

iii) ab + bc + ca = (-2)*(-3) + (-3)*2 + 2*(-2)

                       = 6  - 6  - 4

                       = 0 -4 = -4

iv) 3ab - 4bc + 5ca = 3*(-2)*(-3)  -4*(-3)*2 + 5*2*(-2)

                             = 18 + 12 - 20

                             = 30 - 20

                            = 10

v) ab + 9 = (-2)*(-3) + 9 = 6 + 9 = 15

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