Find the squares by using the identities: (b – 7)²

Using (h + a) (h + b) = h² + (a + b) h + ab, find 5.2 × 5.1

Using (h + a) (h + b) = h² + (a + b) h + ab, find 104 × 103

Using a² – b² = (a + b) (a – b), find 12.1Sq – 7.9Sq

Find the squares by using the identities: (hy + 3z)²

Find the squares by using the identities: (6h² – 5y)²

Find the squares by using the identities: (0.4p – 0.5q)²

Using a² – b² = (a + b) (a – b), find 51Sq – 49sq

Using a² – b² = (a + b) (a – b), find (1.02)² – (0.98)²

Find the squares by using the identities: (2hy + 5y)²