# ASAP!! PLEASE Will mark the brainliest answer If a + b = 7 and ab = 12, then find the value of a2- ab+ b2 and a3+b3

1 answer

###### Question:

ASAP!! PLEASE Will mark the brainliest answer If a + b = 7 and ab = 12, then find the value of a2- ab+ b2 and a3+b3

## Answers

Answer:13 and 91Step-by-step explanation:(a + b)² = a² + 2ab + b² , substitute values7² = a² + 2(12) + b²49 = a² + 24 + b² ( subtract 24 from both sides )25 = a² + b²Thena² - ab + b²= a² + b² - ab , substitute values= 25 - 12= 13-------------------------------------------a³ + b³ = (a + b)(a² - ab + b²) ← substitute valuesa³ + b³ = 7 × 13 = 91

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