Bidang studi:
MatematikaPenulis:
armantiDibuat:
1 tahun laluJawab:(1.) 9x² - 4 = 0(3x + 2)(3x-2) = 0Hp = {-⅔, ⅔}
(2.) 2x² + 5x - 3 = 0(2x-1) (x+3) = 0Hp = {½, -3}
(3.) 4a(a+1) = 15(2a-3) (2a+5) = 0Hp = {³/₂, -⁵/₂}
(4.) m² - m - 6 = 0(m + 2)(m - 3) = 0Hp = {-2, 3}
Penjelasan :(1.) 9x² - 4 = 0(3x)² - 2² = 0a² - b² = (a+b)(a-b)(3x + 2)(3x-2) = 0Hp = {-⅔, ⅔}
(2.) 2x² + 5x - 3 = 0a = 2x² + 5x - 3(2) =0x² + 5x - 6 = 0b = 5, c = -6b+c = 5, bc = -6-1+6 = 5, -1(6) = -6b = -1, c = 6¹/ₐ (ax+b)(ax+c) = 0½ (2x-1) (2x+6) = 0(2x-1) (²/₂x+⁶/₂) = 0(2x-1) (x+3) = 0Hp = {½, -3}
(3.) 4a(a+1) = 15a(a+1) = ¹⁵/₄a² + a = ¹⁵/₄a² + a + (½)² = ¹⁵/₄ + (½)²a² + 2a(½) + (½)² = ¹⁵/₄ + ¼(a + ½)² = ¹⁶/₄(a + ½)² = 4a + ½ = ±√4a + ½ = ±2a = ±2 - ½Hp = {2 - ½, -2 - ½}Hp = {⁴/₂ - ½, -⁴/₂ - ½}Hp = {³/₂, -⁵/₂}(2a-3) (2a+5) = 0Hp = {³/₂, -⁵/₂}
(4.) m² - m - 6 = 0ab = -6, a + b = -12(-3) = -6, 2 - 3 = -1a = 2, b = -3(m + a)(m + b) = 0(m + 2)(m - 3) = 0Hp = {-2, 3}
(xcvi)
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Nilai jawaban:
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