Question

Q

1 + 13x³ + 7³ × 4x² =
x => 12

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Answer 1

1 + 13x³ + 7³ × 4x²

x → 12

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1 + 13(12³) + 7³ × 4(12²)

1 + 13(12 × 12 × 12) + 7³ × 4(12 × 12)

1 + 13(144 × 12) + 7³ × 4(144)

1 + 13(1.728) + 7³ × (4 × 144)

1 + (13 × 1.728) + 7³ × 576

1 + 22.464 + (7 × 7 × 7) × 576

1 + 22.464 + (49 × 7) × 576

1 + 22.464 + 343 × 576

1 + 22.464 + 197.568

22.465 + 197.568

= 220.033

Answer 2

Q.

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1 + 13x² + 7³ × 4x²

x → 12

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1 + 13(12³) + 7³ × 4(12²)

= 1 + 13(1.728) + 343 × 4(144)

= 1 + 22.464 + 343 × 576

= 1 + 22.464 + 197.568

= 1 + 220.032

= 220.033

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