Question

Решите 3 примера по Алгебре
30 Баллов !

Answer 1

1. 1)

${(p + 8)}^{2} = {p}^{2} + 16p + 64$

2)

${(10x - 3y)}^{2} = 100 {x}^{2} - 60xy + 9 {y}^{2}$

3)

$(x - 9)(x + 9) = {x}^{2} - 81$

4)

$(4m + 7n)(7n - 4m) = (7n - 4m)(7n + 4m) = 49 {n}^{2} - 16 {m}^{2}$

2. 1)

$1 6- {c}^{2} = (4 - c)(4 + c)$

2)

${p}^{2} + 2p + 1 = {(p + 1)}^{2} = (p + 1)(p + 1)$

3)

$9 {m}^{2} - 25 = (3m - 5)(3m + 5)$

4)

$36 {m}^{2} + 24mn + 4 {n}^{2} = {(6m + 2n)}^{2} = (6m + 2n)(6m + 2n)$

3.

${a}^{2} - 20a + 100 - {a}^{2} + 25 = - 20a + 125$