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. Let x = 2,7-3 uuuuu​

Let X 273 Uuuuu class=

Sagot :

PROBLEM:

Add and Subtract each polynomials.

12) (4x² + 5x + 7) + (3x² - 8x + 12)

14) (3x² + 5x - 8) + (x² - 3x + 2)

ANSWER N SOLUTION:

12) (4x² + 5x + 7) + (3x² - 8x + 12)

Determine the signs

4x² + 5x + 7 + 3x² - 8x + 12

Reorder and gather like forms

(4x² + 3x²) + (5x - 8x) + (7 + 12)

Collect coefficients of like terms

(4 + 3)x² + (5 - 8) × x + (7 + 12)

Calculate the sum or difference

= 7x² - 3x + 19

14) (3x² + 5x - 8) + (x² - 3x + 2)

Determine the sign

3x² + 5x - 8 + x² - 3x + 2

Reorder and gather like terms

(3x² + x²) + (5x - 3x) + (-8 + 2)

Collect coefficients of like terms

(3 + 1)x² + (5 - 3) × x + (- 8 + 2)

Calculate the sum or difference

= 4x² + 2x - 6