Question

please answer it please and please​

Answer 1

Step-by-step explanation:

= (x² - 5)(x + 5) + 25

= x³ + 5x² - 5x - 25 + 25

= x³ + 5x² - 5x

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= (t + s²)(t² - s)

= t³ - st + s²t² - s³

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= (a + b + c)(a + b + c)

= a(a + b + c) + b(a + b + c) + c(a + b + c)

= a² + ab + ac + ab + b² + bc + ac + bc + c²

= a² + b² + c² + 2ab + 2ac + 2bc

Answer 2

Answer:

1. x³+5x²-5x

2. a²b³+3a²+5b³+20

3. t³-ts+t²s²-s²

4. 4ac

5. 3x²-y²+2xy

6. x³+y³

7. 1.25x²-2y

8. a²+b²-c²+2ab