Question

can you solve this...,...​

Answer 1

Step-by-step explanation:

c.

$= ( {2p}^{2} - {3r}^{2} )( {p}^{2} + 4 {r}^{2} ) \\ = 2 {p}^{2} ( {p}^{2} + {4r}^{2} ) - {3r}^{2} ( {p}^{2} + 4 {r}^{2} ) \\ = {2p}^{4} + 8 {p}^{2} {r}^{2} - 3 {p}^{2} {r}^{2} - 12 {r}^{4} \\ = {2p}^{4} + 5 {p}^{2} {r}^{2} - 12 {r}^{4}$

d.

=

$= (3x + 2)(3x - 2) \\ = 3x(3x - 2) + 2(3x - 2) \\ = {9x}^{2} - 6x + 6x - 4 \\ = 9 {x}^{2} - 4$