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(3x + 2)(x + a) = 3x^2 + (3a + 2)x + 2a
berarti
3a + 2 = 17
3a = 15
a = 5
b = 2a
b = 2(5)
b = 10
semoga benar yaa... ;-)
bentuk aljabar ax²+bx+c
2.x + 3x.a = 17x
3ax = 17x - 2x
3ax = 15x
3a = 15
a = 5
2.a = b
2.5 = b
10 = b
a+b = 5+10
= 15