Jawaban:
Penjelasan dengan langkah-langkah:
= [x + 1][x + 2]
= (x . x) + (x . 2) + (1 . x) + (1 . 2)
= x^2 + 2x + x + 2
= x^2 + 3x + 2
= [x + 8][2x + 4]
= (x . 2x) + (x . 4) + (8 . 2x) + (8 . 4)
= 2x^2 + 4x + 16x + 32
= 2x^2 + 20x + 32
= [x – 2][x + 5]
= (x . x) + (x . 5) + (-2 . x) + (-2 . 5)
= x^2 + 5x - 2x - 10
= x^2 + 3x - 10
= [3x + 4][x – 8]
= (3x . x) + (3x . -8) + (4 . x) + (4 . -8)
= 3x^2 - 24x + 4x - 32
= 3x^2 - 20x - 32
a. [x + 1][x + 2]
= x . x + x.2 + 1.x + 1.2
= x² + 2x + x + 3
= x² + 3x + 3
b. [x + 8][2x + 4]
= x.2x + x.4 + 8.2x + 8.4
= 2x² + 4x + 16x + 32
= 2x² + 20x + 32
c. [x – 2][x + 5]
= x.x + x.5 – 2.x – 2.5
= x² + 5x - 2x - 10
= x² + 3x - 10
d. [3x + 4][x – 8]
= 3x.x - 3x.8 + 4.x - 4.8
= 3x² - 24x + 4x - 32
= 3x² - 20x - 32
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Jawaban:
a. x^2 + 3x + 2
b. 2x^2 + 20x + 32
c. x^2 + 3x - 10
d. 3x^2 - 20x - 32
Penjelasan dengan langkah-langkah:
a.
= [x + 1][x + 2]
= (x . x) + (x . 2) + (1 . x) + (1 . 2)
= x^2 + 2x + x + 2
= x^2 + 3x + 2
b.
= [x + 8][2x + 4]
= (x . 2x) + (x . 4) + (8 . 2x) + (8 . 4)
= 2x^2 + 4x + 16x + 32
= 2x^2 + 20x + 32
c.
= [x – 2][x + 5]
= (x . x) + (x . 5) + (-2 . x) + (-2 . 5)
= x^2 + 5x - 2x - 10
= x^2 + 3x - 10
d.
= [3x + 4][x – 8]
= (3x . x) + (3x . -8) + (4 . x) + (4 . -8)
= 3x^2 - 24x + 4x - 32
= 3x^2 - 20x - 32
Jawaban:
a. x² + 3x + 3
b. 2x² + 20x + 32
c. x² + 3x - 10
d. 3x² - 20x - 32
Penjelasan dengan langkah-langkah:
a. [x + 1][x + 2]
= x . x + x.2 + 1.x + 1.2
= x² + 2x + x + 3
= x² + 3x + 3
b. [x + 8][2x + 4]
= x.2x + x.4 + 8.2x + 8.4
= 2x² + 4x + 16x + 32
= 2x² + 20x + 32
c. [x – 2][x + 5]
= x.x + x.5 – 2.x – 2.5
= x² + 5x - 2x - 10
= x² + 3x - 10
d. [3x + 4][x – 8]
= 3x.x - 3x.8 + 4.x - 4.8
= 3x² - 24x + 4x - 32
= 3x² - 20x - 32