Fill in the box to factorize:
`3x^2 +4x -4`

Fill in the box to factorize: 2x^2 -x-1

Factorise : 3x^2-4x+1

Factorize: 4x^2-36 .

Fill in the correct factors in the boxes provided to balance the chemical equation. 2KMnO_4+squareFeSO_4+squareH_2SO_4 rarrK_2SO_4 +2MnSO_4+squareFe_(2)(SO_4)_3+squareH_2O