Question

Soal No 8&9 mohon pakai caranya juga

Answer 1

8. Rumus (a + b)^2 = a^2 + b^2 + 2ab
                                = (3x)^2 + 4^2 + 2(3x)(4)
                                = 9x^2 + 16 + 24x
                                = ax^2 + c +bx
    2a - 3b - 4c         = (9)(2) - (24)(3) - (4)(16)
                                = -118

Answer 2

8. (3x-4)^2 = 9x^2-24x+16
a=9 ; b=-24 ; c=16
2a-3b-4c = 2(9)-3(-24)-4(16) = 18+72-64 = 26 (B)

9. a^2/x . 5b^2/yz : 5ab^2/xyz = a^2/x . 5b^2/yz . xyz/5ab^2 = a (D)