Question

17.

Answer 1

Solution:

Using formula (a-b)^2 = a^2-2ab+b^2

$4x^{2} - 12x + k \\ = > (2x) ^{2} - 2(2x)(3) + {3}^{2} \\ \\ = > {(2x)}^{2} - 2(2x)(3) + 9$

Answer:

k = 9

Answer 2

Answer:

Using formula (a-b)^2 = a^2-2ab+b^2

4x 2 −12x+k

=>(2x) 2 −2(2x)(3)+3 2

=>(2x) 2 −2(2x)(3)+9

=> k = 9