1)
m² - mp ( m p ) m² - mp m (m - p) + p (m - p)
------------ x ------------ + ---------- = ------------ x ------------------------------ =
m² + p² ( m + p m - p ) m² + p² (m + p)(m - p)
m² - mp m² - mp + mp - p² m (m - p ) m² - p²
= ------------ x ------------------------------ = ------------ x --------------------- =
m² + p² (m + p)(m - p) m² + p² (m + p)(m - p)
m m² - p² m
= ------------ x ------------ = ------------
m² + p² m² - p² m² + p²
2)
(5a + 1 5a - 1 ) 40a² (5a + 1)(5а + 1) - (5а - 1)(5а - 1) 40a²
---------- -- ---------- : ----------- = ------------------------------------------ : ------- =
( 5a - 1 5а + 1 ) 5а - 1 (5а + 1)(5а - 1) 5а - 1
(25а² + 10а + 1) - (25а² - 10а + 1) 40а²
= ----------------------------------------------- : -------- =
(5а + 1)(5а - 1) 5а - 1
25а² + 10а + 1 - 25а² + 10а - 1 40а² 10а 40а²
= ----------------------------------------------- : -------- = ------------------ : -------- =
(5а + 1)(5а - 1) 5а - 1 (5а + 1)(5а - 1) 5а - 1
10а 5а - 1 1
= ------------------ х -------- = ----------------
(5а + 1)(5а - 1) 40а² 4а (5а + 1)
(5х² - 3) / (5х + 1) = х - 2,
5х + 1 ≠ 0,
5х ≠ -1,
х ≠ -1/5
5х² - 3 = (5х + 1)(х - 2),
5х² - 3 = 5х² - 10х + х - 2,
10х - х = 3 - 2,
9х = 1,
х = 1/9
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Answers & Comments
Verified answer
1)
m² - mp ( m p ) m² - mp m (m - p) + p (m - p)
------------ x ------------ + ---------- = ------------ x ------------------------------ =
m² + p² ( m + p m - p ) m² + p² (m + p)(m - p)
m² - mp m² - mp + mp - p² m (m - p ) m² - p²
= ------------ x ------------------------------ = ------------ x --------------------- =
m² + p² (m + p)(m - p) m² + p² (m + p)(m - p)
m m² - p² m
= ------------ x ------------ = ------------
m² + p² m² - p² m² + p²
2)
(5a + 1 5a - 1 ) 40a² (5a + 1)(5а + 1) - (5а - 1)(5а - 1) 40a²
---------- -- ---------- : ----------- = ------------------------------------------ : ------- =
( 5a - 1 5а + 1 ) 5а - 1 (5а + 1)(5а - 1) 5а - 1
(25а² + 10а + 1) - (25а² - 10а + 1) 40а²
= ----------------------------------------------- : -------- =
(5а + 1)(5а - 1) 5а - 1
25а² + 10а + 1 - 25а² + 10а - 1 40а² 10а 40а²
= ----------------------------------------------- : -------- = ------------------ : -------- =
(5а + 1)(5а - 1) 5а - 1 (5а + 1)(5а - 1) 5а - 1
10а 5а - 1 1
= ------------------ х -------- = ----------------
(5а + 1)(5а - 1) 40а² 4а (5а + 1)
(5х² - 3) / (5х + 1) = х - 2,
5х + 1 ≠ 0,
5х ≠ -1,
х ≠ -1/5
5х² - 3 = (5х + 1)(х - 2),
5х² - 3 = 5х² - 10х + х - 2,
10х - х = 3 - 2,
9х = 1,
х = 1/9