Question

Find the following 12x2​

Answer 1

$5x + 12 {x}^{2} - 12 + 3 {x}^{2} + 15 {x}^{2} \\ = 12 {x}^{2} + 3 {x}^{2} + 15 {x}^{2} + 5x - 12 \\ = 30 {x}^{2} + 5x - 12$

And also , your second question-
12×2
=24

Answer 2

Answer:

${5x} + {12x}^{2} - 12 + {3x}^{2} + {15x}^{2} \\ = {15}^{2} + {12x}^{2} + {3x }^{2} + {5x} - 12 \\ = {30x}^{2} + 5x - 12$