kakak bantu saya mengerjakan pr mtk pake cara ya

1.
A = 2xy + 10x
B = 5x - 3xy

A + 2B =
2xy + 10x + 2(5x - 3xy)
= 2xy + 10x + 10x - 6xy
= 20x - 4xy (C)

2.
L = (2x - 8)² = (4x² - 32x + 64) cm² (B)

3.
L = 22/7 . (2m + 7)²
L = 22/7 . (4m² + 28m + 49)
L = 88m²/7 + 88m + 154 (A)

4.
25a - 10a² = 5a(5 - 2a)
jawaban C

5.
m² - 16= (m + 4)(m - 4)
jawaban C

6.
16m² - 24m + 9n² = (4m - 3n)²
jawaban C

7.
9x² + 42xy + 49y² = (3x + 7y)²
jawaban C

8.
-16 + 10x + 6x² = (3x + 8)(2x - 2)
jawaban B

9.
9a³b³ + 27a²b² - 4ab³
= ab²(9a²b + 27a - 4b)

jawaban D