Question

Selesaikanlah
1. 3x (x + 2)
2. (x +3) (2x - 4)
3. (x + 7)"
4. (x - 8)"
5. 16 - H"
6. (x + 12) (x - 12)

"it pankt 2
tlong jwab pkai jlan y

Answer 1

1. 3x(x +2) = 3x^2 + 6x
2. ( x+ 3)(2x-4) = (x)(2x) + (x)(-4) + (3)(2x) + (3)(-4) = 2x^2 - 4x + 6x -12
   = 2x^2 + 2x - 12
3. (x + 7)(x+7) = x^2 + 7x + 7x + 49 = x^2 + 14x + 49
4. (x -8) (x-8) = x^2 - 8x -8x + 64 = x^2 - 16x + 64
6. ( x + 12)(x- 12) = x^2 - 12x + 12x - 144 = x^2 - 144

no 5 kurang jelas soalnya..

Answer 2

Jawabn nomer 1
=  3x (x + 2)
= 3x² + 6x

jawabn nomer 2
= (x +3) (2x - 4)
= 2x² - 4x + 6x - 12
= 2x² + 2x -12

jawabn nomer 3
= (x + 7)²
= (x+7) ( x+7)
= x² +7x +7x +49
= x² +14x +49

jawabn nomer 4
= (x - 8)²
= (x-8) (x-8)
= x² -8x -8x +64
= x² -16x +64

jawabn nomer 5
= (16 - h)²
= (16 -h) (16-h)
= 256 -16h -16h +h²
= h² - 32h + 256

jawabn nomer 6
= (x + 12) (x - 12)
= x² -12x +12x - 144
= x² -144