Hi. Please i need help with these questions :

Simplify
1.
2.
3.

1)

2)

3)

1.

By using identinty a² - b² = (a + b)(a - b) in numerator and splitting method in denominator :

Hence, answer is

________________________________

2.

By using identinty a² + 2ab + b² = (a + b)² in numerator and a² - n² = (a + b)(a - b) in denominator :

Hence, answer is

________________________________

3.

By using splitting method in both numerator and denominator :

Hence, answer is

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

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

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form

.19875994384

step-by-step explanation:

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