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Cahriber
@Cahriber
March 2022
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Se aumentarmos em 4 cm o lado de um quadrado , sua área aumentará 49 cm2 . Qual é a medida do lado do quadrado inicial ?
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mozarth11
Verified answer
(x+4)² = x²+8x+16 = x²+49
8x +16 = 49
8x = 49 - 16
8x = 33
x = 33/8
Verificação:
(33/8 + 4)² = (33/8+32/8)² = (65/8)² = 4225/64
(33/8)² = 1089/64
4225/64 - 1089/64 = 3136/64 = 49
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Verified answer
(x+4)² = x²+8x+16 = x²+498x +16 = 49
8x = 49 - 16
8x = 33
x = 33/8
Verificação:
(33/8 + 4)² = (33/8+32/8)² = (65/8)² = 4225/64
(33/8)² = 1089/64
4225/64 - 1089/64 = 3136/64 = 49