Question

4(x+5)(x+6)(x+10)(x+12)-3×3

Answer 1

原式=4(x+5)(x+6)(x+10)(x+12)－3×3 =4(x+5)(x+12)(x+6)(x+12) －3×3 =4(x^2+17x+60)(x^2+16X+60) －3×3 =2^2(x^2+Ax+60)^2－3^2