I need help . Plz...

A. 2x⁴ - 11x³ + 7x² + 5x - 3

Step-by-step explanation:

Given (2x² - 3x + 1)(x² - 4x - 3)

Multiply both polynomials by distributing the terms 2x², -3x, 1, to every term you have in the second polynomial respectively.

Thus,

2x²(x² - 4x - 3) -3x(x² - 4x - 3) +1(x² - 4x - 3)

Open the parentheses by multiplying

2x⁴ - 8x³ - 6x² - 3x³ + 12x² + 9x + x² - 4x - 3

Pair like terms

2x⁴ - 8x³ - 3x³ - 6x² + 12x² + x² + 9x - 4x - 3

2x⁴ - 11x³ + 7x² + 5x - 3

The right answer is: A. 2x⁴ - 11x³ + 7x² + 5x - 3

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step-by-step explanation:

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2.2°  

step-by-step explanation:

let θ = the angle of elevation.

tanθ =77/2020

tanθ = 0.038 12

      θ = tan⁻¹0.038 12

      θ = 2.2°