Answer:
[tex]x^{2} -1764[/tex]
Step-by-step explanation:
1) Evaluate the exponent:
[tex]x^{2} -1*42^2\\x^{2} -1*1764[/tex]
2) Multiply the numbers:
[tex]x^{2} -1*1764\\x^{2} -1764[/tex]
