Question

find the modulus of the complex numbers 3+4i/1+7i​

Answer 1

Step-by-step explanation:

z1,z2 being two complex numbers,

∣z1.z2∣=∣z1∣.∣z2∣

∴∣(1+i)(3+4i)∣=∣1+i∣⋅∣3+4i∣

=12+12×32+42

=225

=50