alleryStart learning →Evaluate (2 + 3i)(1 - i) and write the result in the form a + bi.
A5 + i
B-1 + i
C2 - 3i
D5 - i
Answer & Solution
Correct answer: A. 5 + i
Expanding gives 2 - 2i + 3i - 3i squared, and with i squared = -1 this is 5 + i.
Keep practising Complex Numbers and Quadratic Equations
Browse all Complex Numbers and Quadratic Equations questions for MHT-CET, or explore more Mathematics topics.
Related questions
What is the real part of (2 + i) squared?Adding two complex numbers on the plane gives the fourth vertex of which shape?Geometrically, multiplying by a complex number does what to the plane?The complex numbers form a real vector space of what dimension?The polynomial x^2 - 2 has no root in which set?The roots of x^2 + 2x + 5 = 0 are which pair?The equation x^2 + 4 = 0 has no real root. What are its complex roots?Which number set contains a root of every non-constant polynomial equation?