Question

Q.

f(x) = x² + 5x - 3x
f(5) = ..

panjang persegi 15 dan lebar 7 cm luas dan keliling ? ​

Answer 1

Answer 2

SOAL 1

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f(x) = x² + 5x - 3x

___________________________________________ f(5) = 5² + 5(5) - 3(5)

f(5) = (5 × 5) + (5 × 5) - (3 × 5)

f(5) = 25 + 25 - 15

f(5) = 25 + 10

f(5) = 35

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SOAL 2

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Cara 1 :

K Persegi = 2 × (P + L)

K Persegi = 2 × (15 + 7)

K Persegi = 2 × 22

K Persegi = 44 cm

___________________________________________ Cara 2 :

K Persegi = 2P + 2L

K Persegi = 2(15) + 2(7)

K Persegi = 30 + 14

K Persegi = 44 cm

___________________________________________ L Persegi = P × L

L Persegi = 15 × 7

L Persegi = 105 cm²

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