Jawabanmu

2014-08-30T14:46:08+07:00
1. 8x^2-(-4) y^-3-(-7)= 8x^2+4 y^-3+7 = 8X^6 y^-4 = 8x^6/y^4
3. (4√2+3√6)(4√2+3√6) = 16√4+12√12+12√12+9√36 = 16×2+24√12+9×6 = 32+24√4×3+54 = 86+24×2√3 = 86+48√3