Question

Simplify:
−4x² + {(2x² − 3) − (4 − 3x²)}

Answer 1

−4x² + {(2x² − 3) − (4 − 3x²)}

We will first remove the innermost grouping symbol ( ) and then { }.

∴ −4x² + {(2x² − 3) − (4 − 3x²)}
= −4x² + {2x² − 3 − 4 + 3x²}
= −4x² + {5x² − 7}
= −4x² + 5x² − 7
= x² − 7