Question

Solve (t^2 - 2)(t^2 - 5) using identities

Answer 1

Step-by-step explanation:

99

2

=(100−1)

2

Using,

(a−b)

2

=a

2

−2ab+b

2

we get,

=(100)

2

−2(100)(1)+(1)

2

=10000−200+1

=9801

Answer 2

Answer:

${t}^{4} - 7 {t}^{2} + 10 \: \: ans$

Step-by-step explanation:

$( {t}^{2} - 2)( {t}^{2} - 5) \\ {t}^{2} ( {t}^{2} - 5) - 2({t}^{2} - 5) \\ {t}^{4} - 5 {t}^{2} - 2 {t}^{2} + 10 \\ {t}^{4} - 7 {t}^{2} + 10 \: \: ans$