Solve all Q28 explaining detailly each step -5+10i20. Express the complex number Z. where Z=in the form a + ib where a. b ER. hence or1+2iotherwise, finda) The modulus and argument of Zb) The square roots of Z.21. i) Given that Z, = i(5+4i), express Z, in the form a + ib and hence find /Z¡/ii) Find the locus of points Z such that arg(Z- 2+ 3i)IT4111) Verify that 2+ 3i is a root of the equation Z – 5z + 17z - 13 = 0. Find the other roots ofthis equationTπ、22. Given that Z = 2 - 3i, express Z/Z* and Z(cos--isin ) in the form a + bi, where a and b are44real constants and Z* is the complex conjugate of Z.23. i) Given the complex numbers Z = 2 + i and Z,= -1+ 2i. Evaluate,|Z,+Z2!a)Z1-Z2b) arg(-)tto 1 decimal place, where Z* is the conjugate of Z.Z2Z-1ii) Given that =ri, where A is a reai parameters, show that the locus of the point P whichIZ+11represents Z on the complex plane, is a circle, stating the coordinates of the centre and theradius.1V3.24.1) Given that Z+V3i and Z = -- Find z'. Hence deduce the value of Z,512 22 2ii) Find the square roots of zi giving the modulus and arguments of each of them.iii) Prove that for two complex numbers Z, and Z, argZ 1-Z22.25.1) Find the square root of the complex number z=5+ 12iii) Find the modulus and argument of the complex number z(1+i)?(-1+i)*iii) Given that z = 1+iv3 represent the complex numbers zz* and -as vectors on anArgand diagram where z* is the complex conjugate of z.26. (i) Find the two complex numbers z,and z2 which simultaneously satisfy the equationsZ+Z2 = --i and z - Z2 = -2+ 5iZ+1(ii) Given that:i find z in the form a + ib, where a and b are realZ--1(iii) Find the complex number z such that: /z! +z = 1+ 2i27. (i) Express in the form a + ib, the complex number z, where a and b are real constants given4-3ithat ( z - (1+ 3i) = 1- 2i .2-i(ii) Verify that the complex numbers Z, = 1 - iV 3 and Z, = 1 + iv3 are roots of p(z) = 0.where p(z) = z* – 3z' + 8z - 24. Hence, find the other roots of p(z) = 0%3D%3D2(1+i)express Z, and Z,Z2 in the form a28. (i) Given the complex numbers Z; = 10 + 5i and Z,3-i+ bi, where a, b EO and Z is the complex conjugate of Z,.(ii) Find the locus of points represented by complex numbers, z such that2/z-3/ /z- Gi/.29. D Find in the form: a+ bi, a, b E R, the complex number z such that:78

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We need to attempt question 28.
Note: We’ll answer the first question since the exact one wasn’t…

2(1+i) = 10+5i and Z2 28. (i) Given the complex numbers Z, + bi, where a, b ED and Z is the complex conjugate of Z2. express Z2 and Z,Z2 in the form a 3-i