Question

evolute of the rationalising The denominator of 25 upon under root 40 minus under root 80 it being given that under root 5 is equal to 2.236 and under 10 3.162​

Answer 1

Answer:

25/√40-√80

=25/2√10-4√5

=25/2(√10-2√5)

=25(√10+2√5)/2(√10-2√5)(√10+2√5)

=25(√10+2√5)/2(10-20)

=-25(√10+2√5)/20

=-5(√10+2√5)/4

=-5(3.162+2×2.236)/4

=-5(3.162+4.472)/4

=-5×7.634/4

=-5×1.9085

=-9.5425

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