Question

Solve:
1) 20×20-15×15÷175
2) x^4-17x^2+16

please don't write just answer .. solve it by method​

Answer 1

Answer:

2) x⁴ -17x²+16

= x⁴ -16x²-x²+16

= x² (x²-16) -1(x²-16)

=(x²-16)(x²-1)

I hope this may help u...