Question

what should be added to 4b²-a² to get b²-4a²​

Answer 1

Answer:

$(4b^{2}-a^{2})-(b^{2}-4a^{2} )=3b^{2} +3a^{2}$

Step-by-step explanation:

Answer 2

Step-by-step explanation:

Let the number to be added be x

$4{b}^{2} - {a }^{2} + x = {b}^{2} - 4 {a}^{2}$

$x = {b}^{2} - 4 {a}^{2} - 4 {b}^{2} + {a}^{2}$

$x = - 3 {a}^{2} - 3 {b}^{2}$

$x = - 3( {a}^{2} + {b}^{2} )$