Question

If x=3 nd y=-1 find the value of (9y²-4x²) (81y⁴+36x²y²+16x⁴)
please it's urgent​

Answer 1

Answer:

-45927

Step-by-step explanation:

(9y²-4x²) (81y⁴+36x²y²+16x⁴)

= { 9(-1)² - 4(3)² } { 81(-1)⁴ + 36(3)²(-1)² + 16(3)⁴ }

= { 9 - 4(9) } { 81 + 36(9) + 16(81) }

= { 9 - 36 } { 81 + 324 + 1296 }

= { -27 } { 405 + 1296 }

= { -27 } { 1701 }

= -45927