We know that,(x + 4)(x + 4) = (x + 4)2From formula, (a + b)2 = a2 + b2 + 2ab(x + 4)2 = x2 + 42 + 2 × x × 4= x2 + 8x + 16

Q5 of 95 Page 94

(x + 4)(x + 4) = ?

We know that,

(x + 4)(x + 4) = (x + 4)²

From formula, (a + b)² = a² + b² + 2ab

(x + 4)² = x² + 4² + 2 × x × 4

= x² + 8x + 16

(x + 5) (x - 3) = ?

(2x + 3)(3x - 1) = ?

(x - 6)(x - 6) = ?

(2x + 5)(2x - 5) = ?