17. Hasil dari (2x + 3)(x – 4) adalah…. a. 2x2 – 5x – 12 b. 2x2 + 5x – 12 c. 2x2 + 5x + 12 d. 2x2 – 5x + 12 Tolong di bntu jwb ya

w − t h e w i d t h l − t h e l e n g t h w = l − 12 t h e p er im e t er o f rec t an g l e : P = 2 ( w + l ) an d P = 156 c m 2 ( w + l ) = 156 → p u t w = l − 12 t o e q u a t i o n : 2 ( l − 12 + l ) = 156 2 ( 2 l − 12 ) = 156 ∣ d i v i d e b o t h s i d es b y 2 2 l − 12 = 78 ∣ a dd 12 t o b o t h s i d es 2 l = 90 ∣ d i v i d e b o t h s i d es b y 2 l = 45 w = 45 − 12 = 33 S o l u t i o n : t h e w i d t h e q u a l 33 c m an d t h e l e n g t h e q u a l 45 c m .

Answered by Anonymous | 2024-06-24

The width of a rectangle is 12 cm less than the length, and the perimeter is 156 cm. To find the width and the length, let's denote the length as L and the width as W . The problem tells us that W = L - 12. The formula for perimeter P of a rectangle is P = 2L + 2W. Plugging in the values, we get 156 = 2L + 2(L - 12).
Simplify the equation: 156 = 2L + 2L - 24. Combine like terms: 156 = 4L - 24. Add 24 to both sides: 180 = 4L. Divide by 4: L = 45 cm. Now find W by substituting L into W = L - 12: W = 45 - 12 = 33 cm.
So, the length of the rectangle is 45 cm and the width is 33 cm.

Answered by qwcat | 2024-06-24

The length of the rectangle is determined to be 45 cm, while the width is 33 cm.
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Answered by Anonymous | 2024-09-05

Jawaban:2x² - 5x - 12Penjelasan dengan langkah-langkah:= (2x + 3)(x - 4)= (2x.x) + (2x.-4) + (3.x) + (3.-4)= 2x² - 8x + 3x - 12= 2x² - 5x - 12[tex]\boxed{ \red{ \boxed{\pink{\mathcal{M \frak{ ilana} \purple{ \tt01}}}}}} [/tex]

Answered by Milana01 | 2025-07-07